Villager sleeping in a bed gets sucked into a minecart while still in sleeping position

Villagers sleeping in a bed are sucked into a minecart that comes beside them, where they remain lying down.

Steps to reproduce:

1. Disable the daylight cycle and set the time to night.
2. Place a bed.
3. Spawn a villager beside the bed and wait for it to lie on the bed.
4. Place rails beside the bed.
5. Place a minecart beside the bed.

Observed results:
The villager moves into the minecart and remains in a sleeping position.

Expected results:
The villager remains in the bed. (At least that's what happens when you try this with a boat instead of a minecart.)