The preview was unresponsive after loading:
The preview was unresponsive after loading. This is most often related to a plugin conflict or aggressive page cacheing.
There is no caching plugin, we changed memory limits in wp-config.php, renamed .htaccess and tried to change permalinks settings, nothing worked.
Even "downgraded" wordpress to an older version, but to no avail.
Working on a "development" server that has no real workload.
Can you help with this issue as we are hours away from going production with the site.