I updated to the latest beta and seems to have fixed it. A few videos in but it's doing well.
I'm on 12.2.0 and installed 7.3.0 beta 4. Make sure to log out and then log in again. Also as a reminder, you have to get through a handful of sign-ins on the Google device login page.
Thanks for you help
What I do. Besides, it takes a while to display just the subscriptions and yt channel. I didn't have this problem before, everything was smooth.