How do I resolve this?

I recently started filming 4K footage, 24fps on my iPhone 16 pro max. But for some reason when I import it into Vegas Pro, some of the clips have random segments of this. Just these grey pixels all over the place. If I split a clip, it will randomly generate it somewhere on the clip. I can find almost no resources anywhere online for Vegas Pro these days. After this video, I’m 95% sure I’m switching to Davinci Resolve. It’s seems like Vegas has been abandoned. Is there anyone out there hearing this distress signal that can actually help me? Anyone at all??