Session no longer available... on every server?

Trying to access Servers on the custom games browser, but every lobby I try joining always presents me with “Session no longer available”. 1st error, OK somebody joined as I was about to join. 2nd, that can’t be right, there’s only 13 people in there. 3rd OK this has to be a joke. 4th, only 1 player out of 16, “Session no longer available.”
This is starting to get annoying real fast

I have exact same issue