In Chat Room, the count of users between nodes is different. Node running room shows correct value, remote nodes show incorrect values.

Verified the patch locally. Problem prevented.

This is likely to be caused by the way a nickname is represented in the MUCRole descendants.

LocalMUC user creates a (local) MUCRole like this:

While RemoteMUCRole gets its nickname from an event, that specifies the value like this:

Notice that one implementation trims the resource, while the other one doesn't.

This behavior corresponds with what we see on our domain: malicious users are flooding MUC rooms with nicknames that never get cleaned up (not even after the client disconnects).