Pongmin

So ive been trying to get on a server but it keeps saying could not connect to a default or fallback server. I know that this can happen when the server is starting up but this has been happening for a hour now and I'm not sure what is wrong

This isn't a bug, I believe there is a chance of a villager changing their trade offers if you never traded with that villager. Next time trade with that villager when you get the wanted trade as fast as possible to lock its trade