did you make sure when you wound him down for hibernation that he had an empty belly..ie no food n heat left on initially to digest the food?
if you've done all this and given him bath s leading up to hibernation it should be ok. Just do weekly weigh ins, they should lose no more than 1% of their total body mass per month when in hibernation. often when they first go into hibernation they'll drop more than this..but a few weeks down the line will steady out. obviously your lil un is being awkward
I wouldn't worry tho hun, just make sure you're keeping a close eye on him. (Make sure you're checking him daily to make sure his cloacal area is clean and that he hasnt passed any urates or faeces)