makeitbeep

Just wanted to mention that I'm having a different half-door issue, which is filed in  MC-152915 and might be related.

I'm seeing this issue as well, on the latest snapshot (currently 19w36a).  New players who join the world for the first time are unable to open the first door they interact with, instead getting a half-door.  Other players do not see the half door.  Right-click functionality appears to break for the new user - at minimum they are unable to interact with chests.  If they reconnect and avoid that first door, all other doors and objects seem to work correctly.  Players can revisit that door and re-experience the problem.  For every right-click that doesn't work, the server emits a message like this:

[20:47:36] [Server thread/WARN]: Mismatch in destroy block pos: ew{x=0, y=0, z=0} ew{x=-110, y=67, z=-195}

This is with an entirely vanilla server.jar and no plugins.

Just searching through Jira for "half door" I also found MC-152865 which might be related.