There is a problem which I faced few times in my phone (IQOO NEO 10R), there is a bug or what it is i don't know, but when I am watching videos on YouTube and if some one or suddenly i minimize the YouTube app for a call, when I reopen the YouTube app it's start lagging the video if i change the video is still the same lagging for not to lag i need to clear the YouTube for my background running apps and then restart the app again.
( for clearance I was waiting shorts on YouTube and the shorts video started lagging or shuttering the video, it's only happen few times).