Trading with villagers doesn't lock their profession on MCPE (Bedrock), wasting resources and making it difficult to create a village

I was working on a village with 2 of each profession, having a total of 26 named villagers. A tough task but nonetheless one i'm passionate about. For whatever reason, villager AI has been incredibly buggy on Minecraft: Pocket Edition recently. I would have 6 unclaimed lecterns for a villager to path find to in the same room, but they would become a butcher and try walking to a smoker dozens of blocks away. I had a villager who didn't change professions yet wasn't wearing any green and now i have villagers so i trade with but still change professions, even though it's supposed to lock. A bonus bug is that every time i log into MCPE, it says "failed to load character 4" after the new skin update was added.