It;s YouTube's (i.e. Google's) app, Roku merely provides the platform on which to run the Roku-compatible version of the app supplied by YouTube.
They are always messing with the user interface and background code.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X