The program freaks out a small bit when you disconnect from a server while holding M for the magnifier. The mangnification window does not go away, and (as far as I can tell) the window notifying you that you have been disconnected does not appear. This happened when my Ubuntu laptop lost wifi while playing a puzzle with two other friends, so it may be a Linux-only bug. My only solution was to open the System Monitor and kill Tabletop Sim's process, then start it up again. Since this was my first time launching TTS from my laptop, all my settings changes did not save.