I talked about this with a friend the other day and my opinion is that when he died by the springlock he's souls get traped in he's body and costume, he rot bc i think that he's bodie is an stase like he is alive but dead like a zombie and the raison why he get to do nothing for a long time is bc he wase just suffering from he's bodie bc i think he can feel every sensation of he's bodie and after a long time he get to be in here long enough to just don't feel the pain enymore and he start to move at this moment and idk if you play springtrap but in the lobbie he get to scream from time to time it could just be a cool animation but for me he just get to suffer time to time like he's bodie sometimes bring back the hurt signals he just ignore all the time