It depends if the PUL layer has gone crunchy with the heat, if it has then more than likely they'll leak. If you got them out in time or it wasn't too hot they'll be ok.
Thanks for the responses, girls. I got them out as soon as it had finished, it wouldn't let me get them out before! They have gone super soft and not crunchy or bunched up at all, so I'm hoping they're ok. Haven't used one yet though, so time will tell.