I've had some feedback from a member. They had access to one group, and when they select the menu item group, it shows the one that they have access to, along with the JOIN option, accompanied by an arrow. They were clicking the join button, not realising that they were already in the group and could click the group to access. This was confusing them as they were being prompted for a join code.

I don't think this is such of a problem when they are part of multiple groups but it certainly is a UI issue for some users.