Extreme lag when opening/closing door. Frame time spikes to 100ms. Similar issue occurs when breaking/placing blocks, especially under the tree farm behind the door. The issue occurs in single player, vanilla multiplayer, and other servers such as spigot. The world was also provided to someone else and they confirmed the issue.

Door coords: 36 / 64 / -384

 Here's the world file: https://drive.google.com/open?id=14WGy15Tc3Tz0dJgo8C4NcLUgBrh39Plj

And here is the result of repeatedly opening and closing it: 

2ae180405d53265f516109f62bf6d3fa.mp4