After the 1.16.100 update, about 75% of the 20ish villagers in a trading hall disappeared. They reappear when I quit the game and reload, but often disappear later. It's unclear what is triggering this. They also occasionally glitch out of the containing structure. When this happens, I sometimes see them "teleport" outside of the structure, almost like an enderman.

The villagers also sleep on the floor now. At night they are scattered across the floor of the trading hall, oriented in random directions (i.e., not like they are sleeping in an invisible "bed"). I'll try to upload a screen shot of this.