Robin Slot

I can reproduce on 1.15.2. Sometimes it saves, sometimes it doesn't.

test 1:

[15:10:39] [Server thread/INFO]: Done (12.680s)! For help, type "help"
[15:10:54] [Server thread/INFO]: Stopping server
[15:10:54] [Server thread/INFO]: Saving players

test 2:

[15:11:21] [Server thread/INFO]: Done (13.268s)! For help, type "help"

test 3:

[15:13:34] [Server thread/INFO]: Done (13.168s)! For help, type "help"