Only encountered a single bug during my playthrough all the way up to night 6, sometimes when Suki gets into the room and her minigame is triggered, it often happened that even if I did beat her minigame and she went away, the little screen that pops up during said minigame would still remain there in place even after she was gone, it would remain even if I went to look into the hallways (Can't remember if it also showed up while watching the cameras), it would only go away whenever I restarted the night over again.
I believe this might happen if you complete the minigame too fast, at least for me it would occasionally appear whenever I completed it before Suki could get a second pump in.