rplatham edit:
When near a bed under a 2 block high ceiling, the player can walk or run up to an edge of a bed, jump and hold forward and the view will shake as the player is squeezed between the bed and the ceiling. At particular angles to the bed/ceiling, the player takes suffocation damage which stops if the player lets go of forward.

The ceiling must be 2 blocks high over the player, not necessarily over the bed. The bug happens if running, walking or crouching. The bug happens if autojump is on or off. It appears to happen more frequently from one side of the bed than from the other.

Original Report:
I was playing survival mode. i made my bed and i put it in a corner. The house had 2 blocks vertical space. by accident i ran to the bed and while i was running u started glitching out into the roof while suffocating. My phone Is Lenovo A2010. I cant put a screenshot glitching out cuz it requires pitch perfect timing. Hope You Fix This soon. btw i love minecraft.

From EpicMemeHunter