Hi There @alexsacha
Thanks for writing in and I’m sorry to hear that you’re having this issue. Did you also try disabling your caching plugin and re-test this issue?. You can check the following resource on how to clear all possible caches before testing your issue (https://www.wpbeginner.com/beginners-guide/how-to-clear-your-cache-in-wordpress/).
If you’re still having issues, you can then disable your 3rd party plugins except Cornerstone plugin to see if you’re experiencing a plugin conflict. If the issue resolved, then you can activate your plugins one by one to see which plugin causing the issue.
Also if you haven’t done yet, try increasing your memory limit bu following our guide here (https://theme.co/apex/forum/t/troubleshooting-increasing-php-memory-limit/16935) which is also a possible cause.
If you’re still having issues, please provide us with your WordPress login credentials in a secure note to check your issue further.
Let us know how it goes.
Thanks!