This happened to me too. I just created a test world in 1.14.2, made 4 villagers to go through, then after I tried the same test world with 1.14.3, one of the villagers acted like this. UI just flashed and closed when I tried to trade. This was a villager I leveled up on version 1.14.2, and when trying to interact on the never version it's like this.
This happened to me too. I just created a test world in 1.14.2, made 4 villagers to go through, then after I tried the same test world with 1.14.3, one of the villagers acted like this. UI just flashed and closed when I tried to trade. This was a villager I leveled up on version 1.14.2, and when trying to interact on the never version it's like this.