Thanks for visiting the Roku Community, @nobrock!
We understand your frustration and appreciate you informing us of your experience with YouTube while you are streaming. Don't worry; our team will work on this so we can help you alleviate the inconvenience that this may have caused you.
Firstly, to better understand your concerns and aid the gap in this investigation, we'd humbly request additional information for better visibility:
Your feedback truly matters to us. Also, by helping us provide the information above, we will be one step ahead in resolving this issue. Thanks for your cooperation and understanding.
All the best,
Emman
I have a Tv with Roku and I am having the same issue and only on YouTube for me. I have done the steps you have suggested and this resolves the problem for a little while. I can cast the channel from my phone and it will work. Once the screen is black on the tv using my phone is the only way the app will work on the tv.
Good luck to you. I requested help fixing this issue back in February and the Roku guys just gave the same fix action that doesn't fix the problem. Now they just ignore us because they really don't know what to do about it. Your best bet is to ditch Roku and go with something else.
I have had same issues for about six months talked to help technicians and it helps for short time