Normally, players can not sleep in the nether or the end, because it can explode.

But villagers can sleep in the nether or the end?? That is dangerous.

1. Create a world and be in creative.

2. Find a nether or end portal, or just build it.

3. Once you are in the nether or the end, spawn a villager, and get a bed.

4. Set the day to night.

If you guys do not know about this bug, let me know!