Gray parts in images

Why do I have these gray blocks in some of the images I have in my project? Frames are imported from Figma. They are visible in the preview window as well. I’ve used principle a couple of times before but haven’t had this issue. See screenshot for reference. I could post only one screenshot.

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Could you please update your post with the info it requested? (macOS version, Principle version).
Try importing from figma again. sometimes figma doesn’t send all the images Principle requests.