A couple of observations; so far the black pages seem to be the odd numbered of the series, are the black pages ones that have been rotated or a mix? As far fetched as it seems they may be symptoms. Another possibility is a defective device. Does this happen after the unit has been on a short/long/random time? Do you have any other apps running when it happens, maybe in the background?
Dell Latitude 13.5" 2-in-1 Ubuntu/Win 11
Samsung Note Pro SM-P900 12.2 Android 5.0.2
Samsung S7+, Android 12
Samsung Note Pro SM-P900 12.2 Android 5.0.2
Samsung S7+, Android 12