seems like since adding the QoL feature where a server saves your spot in a group/squad when you get disconnected by crash or whatever error and rejoin, there's a bug introduced related to that feature.

previously, when you crashed out, the server saves your spot in the server for a few min so you can rejoin. after a few min, it resolves that you are fully disconnected and officially ends your connection and gives up your spot. prior to 1.7, you would now have your spot in a squad saved for this time. now you do...

but it seems like there's no timer now to give up your group spot if you're the only person in the squad when you d/c. if you're the only guy in the group, it saves that squad such that nobody else can make it and become SL of that group while you're disconnected. but if you never reconnect, it never resolves and gives that group back up to the stack.