I have the R635 and same soundbar. Worked great until my TV updated to 10.5. I just made a post about this a few minutes ago. (Sorry, it said nothing similar was posted) But I've tried everything and the same things happening to me. Didn't know if I should RMA my soundbar and/or TV. Hopefully we hear of a fix soon.
Edit: For now, if you unplug the HDMI cable from the soundbar, and plug it back in, it shows Atmos again instead of Stereo if thats quicker than the options for now.
After a few days with the Google R646, I returned it. The Roku R635 is better in many ways, even with the broken 10.5 update. I've learned to live with "refreshing CEC devices" every time I turn on my TV. Even bought a new soundbar just to rule that out, and same issue. So again, Roku reps, if your reading this, send this to the software team. We've troubleshooted more than we've like to admit. Let us roll back the FW, or push our a fix.
Well, a month later and still no fix. TCL sent a tech to my house who also couldn't fix the problem and confirmed it in writing. After their tech said it couldn't be fixed I emailed them and asked TCL to replace it with one of the Google OS sets or just refund my money. Their reply was to send them a picture of the Tracker ID again. I replied and reminded them I had already sent them this. Their response was to ignore me for a week and ignore four emails I sent them asking for a status update.
It was only after in my fourth email I reminded them that California law requires them to either fix it, replace it, or send me a refund within 30 days that they bothered to reply and say that they can try to replace it with another identical model. I don't want that. I'd be trading my new set for a refurb that will have the same problem. They also seem to think that sending them a picture of the same tracker ID again will somehow give them new info.
Lets see how long it takes them to reply. If I don't have this fixed, or at least a promise to fix it and exactly how they plan on making it right, I will be filing a complaint with the California AG's office.
As I've said before, all manufacturers have problems with their TVs but the difference is how they respond and address the problems. TCL is the worst I've encountered and because of this I can confidently say that I will no longer buy a single TCL product.
