Boot = perma-block?

While enjoying a game of infection with my friends, I betrayed one of them. So he returned the favor and so on and so forth until I took it a step further and booted him from the game. There was some sort of warning but I was flying through it to kick’m ( My fault, I’m aware )
And now it seems he can’t join any of my game and me his with out a third party.

Is this a thing? Or am I wrong on the whole matter?.
Just troubleshooting over here.
Just about any tip/ideas/facts on the matter are helpful

Hmm removed from the first page so quick.

weird. i guess stopping you from playing with people who you have booted helps to avoid further problems with that person.