Color stripes on media import bug

Hi!
I have a weird bug. Just received a few files from a customer shot on Sony A7S III in 4K (50 and 120 fps).
Upon importing any file to Resolve the first second or two have this weird color stripes. The rest of the footage is fine. What can cause this problem?
Thank you in advance!
I have a weird bug. Just received a few files from a customer shot on Sony A7S III in 4K (50 and 120 fps).
Upon importing any file to Resolve the first second or two have this weird color stripes. The rest of the footage is fine. What can cause this problem?
Thank you in advance!