Hey @redleome,
I see the issue. It happens on the second edit of the page and not by adding an image.
This might be because your database setup doesn’t allow Cornerstone to continually access the database. Regretfully, we couldn’t tell the exact cause as we do not have access to your server. It is only your web host that could investigate this issue as they have server control including the database.
This issue is only specific to a very few specialized web host or server setups. I’d recommend moving to a standard WordPress web host as X and Cornerstone works flawlessly in most web hosts.
Or, please contact your web host to follow the MySQL setup below. Just note that this is not a guarantee that it will work. There might be a special configuration that hinders Cornerstone to work on your setup.
aria_block_size 8192
aria_checkpoint_interval 30
aria_checkpoint_log_activity 1048576
aria_force_start_after_recovery_failures 0
aria_group_commit none
aria_group_commit_interval 0
aria_log_file_size 1073741824
aria_log_purge_type immediate
aria_max_sort_file_size 9223372036853727232
aria_page_checksum ON
aria_pagecache_age_threshold 300
aria_pagecache_buffer_size 134217728
aria_pagecache_division_limit 100
aria_pagecache_file_hash_size 512
aria_recover NORMAL
aria_repair_threads 1
aria_sort_buffer_size 268434432
aria_stats_method nulls_unequal
aria_sync_log_dir NEWFILE
aria_used_for_temp_tables ON
auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
back_log 150
basedir /usr
big_tables OFF
binlog_annotate_row_events OFF
binlog_cache_size 32768
binlog_checksum NONE
binlog_commit_wait_count 0
binlog_commit_wait_usec 100000
binlog_direct_non_transactional_updates OFF
binlog_format ROW
binlog_optimize_thread_scheduling ON
binlog_stmt_cache_size 32768
bulk_insert_buffer_size 8388608
character_set_client utf8mb4
character_set_connection utf8mb4
character_set_database utf8
character_set_filesystem binary
character_set_results utf8mb4
character_set_server utf8
character_set_system utf8
character_sets_dir /usr/share/mariadb/charsets/
collation_connection utf8mb4_unicode_ci
collation_database utf8_general_ci
collation_server utf8_general_ci
completion_type NO_CHAIN
concurrent_insert AUTO
connect_timeout 10
datadir /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/data/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
deadlock_search_depth_long 15
deadlock_search_depth_short 4
deadlock_timeout_long 50000000
deadlock_timeout_short 10000
debug_no_thread_alarm OFF
default_master_connection
default_regex_flags
default_storage_engine InnoDB
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
div_precision_increment 4
error_count 0
event_scheduler OFF
expensive_subquery_limit 100
expire_logs_days 1
external_user
extra_max_connections 1
extra_port 0
flush OFF
flush_time 0
foreign_key_checks ON
ft_boolean_syntax + -><()~*:""&|
ft_max_word_len 84
ft_min_word_len 4
ft_query_expansion_limit 20
ft_stopword_file (built-in)
general_log OFF
general_log_file dbserver-9d1b5c78.log
group_concat_max_len 1024
gtid_binlog_pos 0-2621846225-23955
gtid_binlog_state 0-2621846225-23955
gtid_current_pos 0-2621846225-23955
gtid_domain_id 0
gtid_ignore_duplicates OFF
gtid_seq_no 0
gtid_slave_pos
gtid_strict_mode OFF
have_compress YES
have_crypt YES
have_dynamic_loading YES
have_geometry YES
have_openssl YES
have_profiling YES
have_query_cache YES
have_rtree_keys YES
have_ssl YES
have_symlink DISABLED
histogram_size 0
histogram_type SINGLE_PREC_HB
host_cache_size 128
hostname dbserver-9d1b5c78.c.pantheon-dmz.internal
identity 560
ignore_builtin_innodb OFF
ignore_db_dirs
in_transaction 0
init_connect
init_file
init_slave
innodb_adaptive_flushing ON
innodb_adaptive_flushing_lwm 10.000000
innodb_adaptive_hash_index ON
innodb_adaptive_hash_index_partitions 1
innodb_adaptive_max_sleep_delay 150000
innodb_additional_mem_pool_size 8388608
innodb_api_bk_commit_interval 5
innodb_api_disable_rowlock OFF
innodb_api_enable_binlog OFF
innodb_api_enable_mdl OFF
innodb_api_trx_level 0
innodb_autoextend_increment 64
innodb_autoinc_lock_mode 1
innodb_buffer_pool_dump_at_shutdown OFF
innodb_buffer_pool_dump_now OFF
innodb_buffer_pool_dump_pct 100
innodb_buffer_pool_filename ib_buffer_pool
innodb_buffer_pool_instances 8
innodb_buffer_pool_load_abort OFF
innodb_buffer_pool_load_at_startup OFF
innodb_buffer_pool_load_now OFF
innodb_buffer_pool_populate OFF
innodb_buffer_pool_size 134217728
innodb_change_buffer_max_size 25
innodb_change_buffering all
innodb_checksum_algorithm innodb
innodb_checksums ON
innodb_cleaner_lsn_age_factor high_checkpoint
innodb_cmp_per_index_enabled OFF
innodb_commit_concurrency 0
innodb_compression_failure_threshold_pct 5
innodb_compression_level 6
innodb_compression_pad_pct_max 50
innodb_concurrency_tickets 5000
innodb_corrupt_table_action assert
innodb_data_file_path ibdata1:12M:autoextend
innodb_data_home_dir
innodb_disable_sort_file_cache OFF
innodb_doublewrite ON
innodb_empty_free_list_algorithm backoff
innodb_fake_changes OFF
innodb_fast_shutdown 0
innodb_file_format Barracuda
innodb_file_format_check ON
innodb_file_format_max Antelope
innodb_file_per_table ON
innodb_flush_log_at_timeout 1
innodb_flush_log_at_trx_commit 2
innodb_flush_method O_DIRECT
innodb_flush_neighbors 1
innodb_flushing_avg_loops 30
innodb_force_load_corrupted OFF
innodb_force_recovery 0
innodb_foreground_preflush exponential_backoff
innodb_ft_aux_table
innodb_ft_cache_size 8000000
innodb_ft_enable_diag_print OFF
innodb_ft_enable_stopword ON
innodb_ft_max_token_size 84
innodb_ft_min_token_size 3
innodb_ft_num_word_optimize 2000
innodb_ft_result_cache_limit 2000000000
innodb_ft_server_stopword_table
innodb_ft_sort_pll_degree 2
innodb_ft_total_cache_size 640000000
innodb_ft_user_stopword_table
innodb_io_capacity 200
innodb_io_capacity_max 2000
innodb_kill_idle_transaction 0
innodb_large_prefix ON
innodb_lock_wait_timeout 50
innodb_locking_fake_changes ON
innodb_locks_unsafe_for_binlog OFF
innodb_log_arch_dir ./
innodb_log_arch_expire_sec 0
innodb_log_archive OFF
innodb_log_block_size 512
innodb_log_buffer_size 8388608
innodb_log_checksum_algorithm innodb
innodb_log_compressed_pages ON
innodb_log_file_size 50331648
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_lru_scan_depth 1024
innodb_max_bitmap_file_size 104857600
innodb_max_changed_pages 1000000
innodb_max_dirty_pages_pct 75.000000
innodb_max_dirty_pages_pct_lwm 0.001000
innodb_max_purge_lag 0
innodb_max_purge_lag_delay 0
innodb_mirrored_log_groups 1
innodb_monitor_disable
innodb_monitor_enable
innodb_monitor_reset
innodb_monitor_reset_all
innodb_old_blocks_pct 37
innodb_old_blocks_time 1000
innodb_online_alter_log_max_size 134217728
innodb_open_files 400
innodb_optimize_fulltext_only OFF
innodb_page_size 16384
innodb_print_all_deadlocks OFF
innodb_purge_batch_size 300
innodb_purge_threads 1
innodb_random_read_ahead OFF
innodb_read_ahead_threshold 56
innodb_read_io_threads 4
innodb_read_only OFF
innodb_replication_delay 0
innodb_rollback_on_timeout OFF
innodb_rollback_segments 128
innodb_sched_priority_cleaner 19
innodb_show_locks_held 10
innodb_show_verbose_locks 0
innodb_simulate_comp_failures 0
innodb_sort_buffer_size 1048576
innodb_spin_wait_delay 6
innodb_stats_auto_recalc ON
innodb_stats_method nulls_equal
innodb_stats_modified_counter 0
innodb_stats_on_metadata OFF
innodb_stats_persistent ON
innodb_stats_persistent_sample_pages 20
innodb_stats_sample_pages 8
innodb_stats_traditional ON
innodb_stats_transient_sample_pages 8
innodb_status_output OFF
innodb_status_output_locks OFF
innodb_strict_mode OFF
innodb_support_xa ON
innodb_sync_array_size 1
innodb_sync_spin_loops 30
innodb_table_locks ON
innodb_thread_concurrency 0
innodb_thread_sleep_delay 10000
innodb_track_changed_pages OFF
innodb_undo_directory .
innodb_undo_logs 128
innodb_undo_tablespaces 0
innodb_use_atomic_writes OFF
innodb_use_fallocate OFF
innodb_use_global_flush_log_at_trx_commit ON
innodb_use_native_aio OFF
innodb_use_stacktrace OFF
innodb_use_sys_malloc ON
innodb_version 5.6.26-76.0
innodb_write_io_threads 4
insert_id 0
interactive_timeout 420
join_buffer_size 131072
join_buffer_space_limit 2097152
join_cache_level 2
keep_files_on_create OFF
key_buffer_size 20971520
key_cache_age_threshold 300
key_cache_block_size 1024
key_cache_division_limit 100
key_cache_file_hash_size 512
key_cache_segments 0
large_files_support ON
large_page_size 0
large_pages OFF
last_gtid 0-2621846225-23955
last_insert_id 560
lc_messages en_US
lc_messages_dir
lc_time_names en_US
license GPL
local_infile ON
lock_wait_timeout 31536000
locked_in_memory OFF
log_bin ON
log_bin_trust_function_creators OFF
log_error /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/logs/mysqld.log
log_output FILE
log_queries_not_using_indexes OFF
log_slave_updates OFF
log_slow_filter admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk
log_slow_rate_limit 1
log_slow_verbosity
log_warnings 1
long_query_time 1.000000
low_priority_updates OFF
lower_case_file_system OFF
lower_case_table_names 0
master_verify_checksum OFF
max_allowed_packet 67108864
max_binlog_cache_size 18446744073709547520
max_binlog_size 1073741824
max_binlog_stmt_cache_size 18446744073709547520
max_connect_errors 1000
max_connections 1024
max_delayed_threads 20
max_digest_length 1024
max_error_count 64
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 1024
max_long_data_size 67108864
max_prepared_stmt_count 16382
max_relay_log_size 1073741824
max_seeks_for_key 4294967295
max_sort_length 1024
max_sp_recursion_depth 0
max_tmp_tables 32
max_user_connections 0
max_write_lock_count 4294967295
metadata_locks_cache_size 1024
metadata_locks_hash_instances 8
min_examined_row_limit 0
mrr_buffer_size 262144
multi_range_count 256
myisam_block_size 1024
myisam_data_pointer_size 6
myisam_max_sort_file_size 9223372036853727232
myisam_mmap_size 18446744073709551615
myisam_recover_options DEFAULT
myisam_repair_threads 1
myisam_sort_buffer_size 134216704
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
net_buffer_length 16384
net_read_timeout 90
net_retry_count 10
net_write_timeout 90
old OFF
old_alter_table OFF
old_mode
old_passwords OFF
open_files_limit 4096
optimizer_prune_level 1
optimizer_search_depth 62
optimizer_selectivity_sampling_limit 100
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on
optimizer_use_condition_selectivity 1
performance_schema OFF
performance_schema_accounts_size -1
performance_schema_digests_size -1
performance_schema_events_stages_history_long_size -1
performance_schema_events_stages_history_size -1
performance_schema_events_statements_history_long_size -1
performance_schema_events_statements_history_size -1
performance_schema_events_waits_history_long_size -1
performance_schema_events_waits_history_size -1
performance_schema_hosts_size -1
performance_schema_max_cond_classes 80
performance_schema_max_cond_instances -1
performance_schema_max_digest_length 1024
performance_schema_max_file_classes 50
performance_schema_max_file_handles 32768
performance_schema_max_file_instances -1
performance_schema_max_mutex_classes 200
performance_schema_max_mutex_instances -1
performance_schema_max_rwlock_classes 40
performance_schema_max_rwlock_instances -1
performance_schema_max_socket_classes 10
performance_schema_max_socket_instances -1
performance_schema_max_stage_classes 150
performance_schema_max_statement_classes 180
performance_schema_max_table_handles -1
performance_schema_max_table_instances -1
performance_schema_max_thread_classes 50
performance_schema_max_thread_instances -1
performance_schema_session_connect_attrs_size -1
performance_schema_setup_actors_size 100
performance_schema_setup_objects_size 100
performance_schema_users_size -1
pid_file /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/mysqld.pid
plugin_dir /usr/lib64/mysql/plugin/
plugin_maturity unknown
port 27157
preload_buffer_size 32768
profiling OFF
profiling_history_size 15
progress_report_time 5
protocol_version 10
proxy_user
pseudo_slave_mode OFF
pseudo_thread_id 15
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_min_res_unit 4096
query_cache_size 0
query_cache_strip_comments OFF
query_cache_type OFF
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
rand_seed1 0
rand_seed2 0
range_alloc_block_size 4096
read_buffer_size 131072
read_only OFF
read_rnd_buffer_size 262144
relay_log
relay_log_index
relay_log_info_file relay-log.info
relay_log_purge ON
relay_log_recovery OFF
relay_log_space_limit 0
replicate_annotate_row_events OFF
replicate_do_db pantheon
replicate_do_table
replicate_events_marked_for_skip replicate
replicate_ignore_db
replicate_ignore_table
replicate_wild_do_table
replicate_wild_ignore_table
report_host
report_password
report_port 27157
report_user
rowid_merge_buff_size 8388608
rpl_recovery_rank 0
secure_auth OFF
secure_file_priv /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/tmp/
server_id 2621846225
skip_external_locking ON
skip_name_resolve ON
skip_networking OFF
skip_replication OFF
skip_show_database OFF
slave_compressed_protocol OFF
slave_ddl_exec_mode IDEMPOTENT
slave_domain_parallel_threads 0
slave_exec_mode STRICT
slave_load_tmpdir /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/tmp
slave_max_allowed_packet 1073741824
slave_net_timeout 3600
slave_parallel_max_queued 3145728
slave_parallel_threads 8
slave_skip_errors OFF
slave_sql_verify_checksum ON
slave_transaction_retries 10
slave_type_conversions
slow_launch_time 2
slow_query_log ON
slow_query_log_file /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/logs/mysqld-slow-query.log
socket /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/data/mysql.sock
sort_buffer_size 2097152
sql_auto_is_null OFF
sql_big_selects ON
sql_buffer_result OFF
sql_log_bin ON
sql_log_off OFF
sql_mode
sql_notes ON
sql_quote_show_create ON
sql_safe_updates OFF
sql_select_limit 18446744073709551615
sql_slave_skip_counter 0
sql_warnings OFF
ssl_ca /etc/pantheon/ca.crt
ssl_capath
ssl_cert /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/certs/binding.crt
ssl_cipher
ssl_crl
ssl_crlpath
ssl_key /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/certs/binding.key
storage_engine InnoDB
stored_program_cache 256
sync_binlog 1
sync_frm ON
sync_master_info 0
sync_relay_log 0
sync_relay_log_info 0
system_time_zone UTC
table_definition_cache 400
table_open_cache 400
thread_cache_size 0
thread_concurrency 10
thread_handling one-thread-per-connection
thread_pool_idle_timeout 60
thread_pool_max_threads 500
thread_pool_oversubscribe 3
thread_pool_size 32
thread_pool_stall_limit 500
thread_stack 294912
time_format %H:%i:%s
time_zone SYSTEM
timed_mutexes OFF
timestamp 1606064314.712698
tmp_table_size 16777216
tmpdir /srv/bindings/5a3a06f1a3cb488c8f2aca6e9c4632d1/tmp
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
tx_isolation READ-COMMITTED
tx_read_only OFF
unique_checks ON
updatable_views_with_limit YES
use_stat_tables NEVER
userstat OFF
version 10.0.23-MariaDB-log
version_comment MariaDB Server
version_compile_machine x86_64
version_compile_os Linux
version_malloc_library system
wait_timeout 420
warning_count 0
Hope that helps and thank you for understanding.