When I lay the tablet on my lap and then sit back (i.e. sitting on a couch) and try to read on the tablet in portrait mode, a semi-faint repeating rainbow patterns show up on the screen. I can still read, but it's annoying. If I sit up and look straight down, the rainbow patterns disappears. It also disappears if I switch to landscape mode. Can someone try the same thing on their tablet and let me know if this is an inherent issue with the tablet? Or is this a defect on mine? Thank you!
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