Of course I trust your expertise, but I am confused.
Its because it only breaks down when set to private. When it is public or hidden it does not occur.
The reason I set it to private is because people can request access, If hidden I can only do by manual invite.
With this additional info you are still sure Its down to theme css?
Regards and Thanks in advance,
I use Activemember360 to deal with my membership stuff. It’s tag-based with Active Campaign. That tells if users have the correct level of access. Not sure if that is related but it’s the core of my site.
I’m not aware of any plugin that uses the @mentions feature.