Door with pressure plate often does not close after pressure plate was released

Door does not close as expected after pressure plate is released.

This happens more often when the door is opened from the outside, and entering the house through the plate. I have wooden door and wooden pressure plate here.

This can be seen in the last attempt in the video.

https://www.youtube.com/watch?v=U7R9UFpYTRI&feature=youtu.be