Hosting a saved coop game doesn't let anyone join

After playing for a little and having a desync we can't resume. I host the saved game selecting all the coop checkmarks and when they try to join they're stuck on waiting for me to accept the hot join but I don't see anything on my end.

Tried resetting the whole game and verifying my files but it didn't help.

Edit: Apparently joining from the server list worked instead of steam invite.