I'm not posting this message to discuss the need (or lack thereof) for it, I'm reporting it as a bug in V12.
As I said, the slider used to work in the intended way and as of V12, it no longer does.
I used to be able to tell it to stay on all the time and the feature worked. Now, even though the slider says it's on all the time, it isn't - unless I do the workaround of turning it from On to Off and back to On.
I'm not sure what TV you have, or what your picture settings are, but Dolby Vision always on looks absolutely stellar on my OLED LG C1. That's the reason I turned it to always on to begin with - I got tired of leaving it off and messing with the picture settings every time I switched apps. It isn't simply a brighter image. Youtube, YoutubeTV, and all other SDR content is dramatically improved with DV set to always on.
If you're satisfied with the end result, that's all that matters in the end. I agree that the switch should retain its setting, so that would absolutely be a flaw/bug.
I don't have an OLED set, so can't speak to how it might look different than mine. As I said, your satisfaction is all that matters. My personal experience with HDR always on was it was unnatural looking, and that was with both a Roku and an Onn player, so two different devices with the same result.
