Cross-play in Spooky Squads

I'm on PC, I have the monster morph card, and I can load into squads, but my two friends on Xbox can't join the game when I invite them. It tells them the event isn't available.

Until two days ago, this was working, but after a game, it sent them back to the menu instead of the squads lobby, and since then, invites don't work.

Maybe it's worth mentioning, they both also had the bug where they didn't get the monster morph card at level 4 in the most feared pass.

My EA ID is "raj70" and one of the Xbox players' EA ID's is "nick23125", if that's useful.

Thanks if anyone from EA gets this to where it needs to go...