Some Sony A7C raw files can be opened by Preview, some cannot

I'm having a pretty strange problem that I can't find the answer for. I have a Sony A7C and shoot in raw, which is officially supported by Mac OS. Usually I can open my photos no problem in Preview, but with more and more of the photos recently I am unable to open some, but not all of the photos.

When I try to open one of these photos, I get the message "The file “SAN00377.ARW” could not be opened. Preview currently does not support this raw file format." But most of the other photos I can open no problem. The problem is usually isolated to a few photos in a row.

I'm also able to open the photos that can't be opened by Preview in Sony's proprietary Imaging Edge software.

I'm having this problem on both my 2021 M1 Pro Macbook Pro and my 2019 Macbook Air.

Any insight into why this strange problem is happening would be appreciated!