Setting validate to 0 only makes it worse.
The white flashes are triggering the uniform detection.
Try setting non_uniformity to a lower value so this does not trigger
If the show has logo enabling logo detection (detection method 43) should make a BIG difference, if this is not possible you get to some others
Try enabling all detection methods (111) to see if this minor error gets ignored
Try the min/max break or show settings to see if the specific case can be filtered out
Try to live with it
Otherwise use the "how to ask for help" posting and I will have a look.