I have the same issue with my 43" Q60R. And I know why, They snuck a PLS panel in 43" while 49" and above has VA panel. Which doesn't have this issue. But they don't mention this difference anywhere. A service engineer is coming today to look at the TV let's see what happens. I have less hope replacing or fixing this issue. I'll never buy a Samsung TV in the future as they're deceiving customers by not mentioning big differences like this anywhere.
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