I and a few friends made a new realm on Bedrock Edition when the 1.16 update came out.

On November 17th the 1.16.100 update came out, and 3 days later about a dozen villagers we had worked to get just vanished and all the trades had been increased. We figured someone had traded with the villagers a lot and then killed them but after looking around apparently, similar things have happened to other people. 

On the other hand, while other people have reported animals missing as well, the only mobs that disappeared were the villagers and it hasn't happened again since. 

We know a mob couldn't have done it and the trades tripling might just be a new feature even if it is a really dumb one.

Now for the glitchiness part, we have a zombie farm but sometimes the zombies glitch outside of the kill chamber, and if you walk on a villager while they are sleeping they move and start floating through walls. This recent update was really stupid and everything should just be reverted.