I think you are right. I tried everything on my new 2020 43" to get the motion detector to switch the set on, to no avail. I knew the detector was working as it kept the set turned on when there was a short time-out in Art Mode. I was displaying Van Gogh's Sunflowers. I changed this to Vauban Confused No.2 which is a simple graphic and it works as expected.
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