I am using the 5E OGL sheet for NPCs. I am creating multiple image tokens using tables, and attaching them to the sheet. I've recently had issues where, when I replace the token on the sheet with an updated one, the character sheet becomes corrupted. When this happens, the abilities won't trigger, or they will be misdirected (i.e whisper to GM even though that wasn't specified in the ability). I even had this corrupt a game once, where an ability conflated with the API, and whenever you triggered an ability from any sheet, this one corrupted ability would trigger. It would also trigger when starting the game. I managed to reset the game when I added the API mod on('ready',()=>log(state)); which I believe is supposed to save a log of the console, but I do not know where that log resides. Anyhow, incorporating this mod restored the game.