Weird Glitchy Area on my Footage

I edit on Final Cut (I just did the update to 10.4 a few days ago) and I noticed there's this weird glitchy area (it almost looks like the old VCR effect) at the top of some of the footage I took. I never experienced this before and I wonder if it has something to do with the new update? The footage looks fine when I play it back on my camera, in Premiere, and from just the file itself on my computer. Luckily I covered some of the messed up footage with b-roll but I have no clue what the problem is. Does it have something to do maybe with the SD card (Sandisk Extreme Pro 128GB) I use possibly being messed up? I shoot on a Canon XA10 and edit on a 2015 Macbook Pro, any help would be great thank you.