Got 2 of them so far. I always played MC single player a lot for relaxing building therapy, so i'm kinda new to this topic. I exchanged some bottles for some emeralds, but now it has a red cross, blocking me for trading exp bottles with them. I can now only trade Eye of Ender with them. Does it needs to recover or any trick out there to make them trade again or can I never trade exp bottles again with them?
to make the x disappear you have to do the trade for the eye of ender, i would suggest making a villager with exp bottles as the last trade.