YT is the only problem for me, likely something to do with YouTube trying to use gQUIC (but I'm not sure).
Same for me. Uninstalled because of this. I feel for those people that won’t understand that the app that says they will get faster speed is the one slowing them down.
Please file a bug report.
I'm having problems recording the screen and playing back the video when reporting a bug.
Also for me. Instagram, Facebook, WhatsApp and Google Photos just load forever. Android 8.1.