If you are using an iPad in portrait mode and you have YouTube open and then do a side by side with the awful app in bookmarks view both apps grind down to about 20fps. If you go into a post from your bookmarks everything smooths back out. This happens on both my iPad Pro gen 3 and my iPad Pro M1 so its not a cpu issue from what I can tell.
To further make the issue weird I just tried to screen record the issue on my M1 and magically the issue went away! I turned off the screen record and the issue came right back.
I’m going to see about getting a shitty cell phone video of it because clearly I can’t just record the screen lol.
Its a really weird issue that I’m sure no one else has come across.
— MarcusSA
https://user-images.githubusercontent.com/177228/151651113-d3bb68d7-9a85-4546-9ef7-c11ab7fdfdfc.mov