A similar looking bug was reported, but for version 15.2 and marked resolved. After exiting the nether, I placed a block, then immediately opened a door. However, only the half of the door I didn't click on opened. The part I clicked on remained closed. The door had its hitbox as half-opened, half closed. Right clicking the door a second time closed both parts of the door, no matter where on the door I clicked. This is the same for top and bottom. After 30 seconds of me messing around and clicking, the doors fixed itself.