They completely rebuilt the color system of Pr2022. It was built as a Rec.709 app "with the ability to use HLG/PQ image data as over-range Rec.709 values ... " to sorta cadge some HDR capabilities into the app.
Now ... it's color space agnostic, and everything has changed, including many default behaviors. And a few things are broken, awaiting a fix. One thing that seems an issue ... all HDR is log-encoded, versus the "integer encoding" of most SDR/Rec.709 media. But ... some Rec.709 media is also log-encoded, and somehow, some camera's Rec.709 log-encoded files are tripping up Pr2022.
Especially from certain Sony & Panny cameras. Let's see ... S-log-3, oh yea, that's Sony ... sigh.
What it seems to do with the cameras it glitches like this on ... it still sees the color space of the file as Rec.709, but displays on a sequence as if the media is HLG. With the wider color space and brighter dynamic range.
Do check the file's properties in the bin, because if it is showing as HLG, you can override to Rec.709 and get past this.
But I'm expecting you'll find it shows a color space in the bin of Rec.709, and if so ... this is a problem.
I'd love to test it here if you've got a clip you could dropbox or whatever.
Neil