My new Roku Remote Pro is paired with a 2019 TCL Roku Tv. When using headphones, the volume up and down is not responsive. The volume increases and decrease at barely perceptible volume levels. The sound quality is also less stereo sounding.
My Roku Gaming Remote is also still paired to the TV and the headphones and personal listening works perfectly.
Also, I tried unpairing the gaming remote to see if that fixed the Roku remote pro and it didn’t. In fact, both remotes kept working even after following the steps to unpair them. But nothing fixed the Roku Remote Pro headphone issues.