Game breaking-freezing

Everytime I join in someone’s world. The game freezes and kicks everyone out. Similar to how it would freeze round June/July 2019.
Last week, I didn’t come across this issue.
I’m on the Xbox One!

I’ve had this a few times, but only if I join a friend from the Xbox guide. Joining randoms from the in-game UI seems fine, as does accepting invites.

Can I ask, are you in the Xbox Insider program?

I’m on the Skip Ahead Alpha build of the OS and was wondering if that might be a factor.