Once you destroy a door at its bottom, the top is briefly shown as open.
Related issues
is duplicated by
Attachments
Comments


Found some other odd behavior with destroying the bottom half of doors:
place the door on a single block facing any direction but WEST
destroy the bottom half of the door and watch how the top part briefly teleports to the WEST.

Needs to be reopened. Affects 14w11b

Can confirm this for a split second (probably one tick / frame)
But this looks quite unfixable / working by design at the moment since the facing and the open/close state is stored in the bottom half of the door: http://minecraft.gamepedia.com/Data_value#Door
Maybe that behaviour will change in the future when the 4 bit data value is replaced by something better.

Confirmed for 14w25b

Still in 1.8

still in 15w45a