Literally after recording a replay on a minehut server, it does this. Its only on minehut though

dude thanks man

Could you please attach one such replay, so I can try to reproduce it on my machine and then debug it?

Same
For me all my replays are affected, Even Single Player

Your also not alone:
#789

If you have multiconnect mod, that mod is the issue

Due to lack of details supplied by the OP, I'll assume this was indeed caused by the multiconnect incompatibility and will close this as a duplicate of #558.