What you are missing is you are watching through a Firestick so your program controls must be the ones for the Firestick, not the Roku. The Roku will display whatever the Firestick sends it, but if the Firestick stops sending ...
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