And try to solve ONE BY ONE the issues. Installing some other plugin to cover some issue, will not help you. Doing massive changes during an issue, ...

@jaroslav-lachky What do you mean debug is the same? Those errors are not from debug.log, they are from wpForo.

Reading your whole topic (oh that was hard), i see you have a LOT of login/hide/security plugins, messing with permalinks (slugs). I suspect all tha...

@jaroslav-lachky Well i have no idea if this is your issue, still TWO security/firewalls is a no go. Use one of them, i would go for Wordfence. An...

The "shut down" and "empty page" from login/register, could be a "white page of death". That means a FATAL error. Have you ever enabled DEBUG TO A L...

Hi, Why do you use All in one Security AND Wordfence? Also your url is "forum", why are you mentioning community-xxx pages?

Ok, the css change doesn't work. BUT the issue happens only with Firefox latest and NOT with Chrome or Edge. So it is a Firefox thing.

@chris Applied it, cleared wpForo cache, no luck. Anyways this is not a big issue. Thanks

Well it has nothing to do with the number (7) as i posted. Also it is NOT specific to my sites, since it is all over several forums running wpForo 2...

@chris Ok, probably specific to my sites, i will test further.

@chris Of cource there is, look at the LAST avatar. It is vertically cut.

@chris That is not from your forums. The issue seems to happens with 7 participants only.

Maybe (not 100% sure) it is happening here also:  Screenshot.png