RCon session prevents normal server stop

I noticed that if I'm connected to my server with RCon and try to stop the game server it never stops and spills in the server log bunch of errors. I expected server to stop gracefully and rcon connection to be disconnected instead.

 

To reproduce i started server and connected to it with mcrcon. When i try to stop the server it never stops. When i exit mcrcon client server manages to stop.

 

Attached you can find the server log.