Roku TV turning off the channel that's on and putting Cars In Roku City Screensaver on instead

I can't be sure if it did or not.  I did disable the "bandwidth" thing.  I have not gotten the "Cars" screen saver again, so far, but the first two nights that I watched CBS via antenna on both nights after a few hours the video feed froze, although the sound continued.  So I had to switch to another channel and then go back to CBS to get the video going again.  So, if there is something timing how long we watch a single channel, I reset that timer by having to go to another channel for a minute.

I didn't watch any TV on the 3rd night.  On the 4th night, I watched CBS OTA for a short time, then switched to Tubi.  At some point, I fell asleep, then when I woke up, I just continued watching, LOL.  After what had been about 5 hours total, I did get a message on the bottom of the screen asking if I was still watching and I said yes.  Then I got a message saying to go to "Mode" in  settings and to turn something off that started with the letter "L".  Sorry, I can't remember what the word was.  But there is no "Mode" under anything in Roku's "Settings" (unless it's buried as a sub menu to something else), so that could have been a Tubi only message.

So, sorry, but I at this point, I can't be 100% sure if it worked or not.  I would just turn off the bandwidth and see if it works for you.  But if the channel you're watching has it's own "are you still there?" thing, I think that's going to kick in, regardless of how you have your Roku set up.

I have not tried resetting my entire TV because mine has that tiny paper clip hole in the back that I'd have to use to do it.  Frankly, not worth the hassle to me to manipulate the TV around so I can get at it.  And I assume after the reset that I'll have to set up all my info, channels, etc., again.  No thanks!