Graphical Mode can reveal guiser1
I'm not sure how widespread this bug is, but switching to graphical mode may lead to an exploit where town can confirm who is guised. In graphical mode, everyone can move around the screen. Except... when the guiser moves around, the dead tombstone moves around, and the player they guised doesn't. So, you can confirm who is guised by who is not able to move.
See this game for an example: https://epicmafia.com/game/7212942