I am running 6.7.0.2, too.
We have the standard Twenty Twenty-Five theme installed.
The only plugin I could think of right now is the Classic Editor plugin.
Otherwise we don’t have many plugins that are layout heavy.
Indeed Ultimate Membership Pro, Super Store Finder, The Events Calendar. That’s it.
But they are not engaged in editing a simple page…
Is there no way I can see the tinymce config somewhere?
