[TRAIT] IS 9416 FLASHIE AF?

For background glitch level #9416 is ruled GOES TO 11 which means "Checkerboard-pattern glitching throughout the loop." However, it looks to have some frames without the checkboard-pattern, which fits the FLASHIE AF definition of "Checkerboard pattern glitching is present in some frames and not in others."

https://opensea.io/assets/0x31385d3520bced94f77aae104b406994d8f2168c/9416

What should the background glitch level be?