LCD rainbow with pressure from Apple Pencil? (iPad Pro 2 12.9)

Good morning y’all
I recently purchased a second-hand iPad in mint condition as my daily driver for digital art.
For clarification, there is not a single sign of damage/use/etc so I heavily doubt anything could’ve caused this besides them being manufactured this way.
When painting with a below-average pressure curve, a faint rainbow distortion appears when painting on the high end of the curve that is typical with applying pressure to a LCD monitor/tv.
Is this normal?
View Reddit by MacabrePuppeteer – View Source