Multiplayer settings bug

Howdy you all

I think I have been having a problem with my multi player settings changing after I set them. 

Specifically the who can join setting seems to change from by invitation only to anyone all by itself.
I have never seen this in a game. FYI
Also my screen name here is my screen name in game so if you’re wanting to look into it I don’t know what else to give you.
Thanks, spartan