You cannot get out of bed / respawn onto soul sand, mud, farmland or dirt path

The algorithm that places players and villagers back into the world after getting out of bed no longer accepts farmland as a valid place for the player to end up.

They also do not accept soul sand

They DO accept stairs.

If you put a bed under a 2-high ceiling and surround it with soul sand or farmland, when the player gets out they will end up on top of the bed in the flying/crawling state. When the villager gets out of the bed in similar circumstances they will end up on top of the bed suffocating on the ceiling (shown in the pictures).