What I expect to happen:

I right click on any villager and I'm able to trade with said villager.

What really happens:

With seemingly random villagers, I right click them, the trades open up for a split second, and then the trade screen automatically closes itself. Previously, I was able to trade with said villager, and now I can't. When this happens once with a villager, it will always happen with that specific villager and trading with said villager will be impossible.

How to reproduce the bug:

I don't know, but I'm guessing it has something to do with opening a villager's trades too often.