I'm constantly booted out of my game with the "Internal Exception: java.util.ConcurrentModificationException" message. No crashlogs are generated, the game doesn't crash, it just acts as if I was playing on the server and got booted out, even tho I'm playing in single.
 
	Here's the screenshot:
 
	And here's the latest.log: https://pastebin.com/CEVZDS8E
 
	 
 
	Any ideas what causes it and how to mitigate it? I'm not a developer, just an average joe looking to enjoy his game in peace.