By don't work, I mean they appear very incorrect. It would be cool if Immich could have proper HDR photo support, since a lot of people are taking HDR photos and videos thanks to smartphones from the past 8 years or so.
I'm also not sure if this is a problem with Rec 709 HDR photos, I didn't test that, but with Rec 2020 HDR photos, they just don't show up correctly. There isn't much of a way that I can show you what I mean if you don't have an HDR display, but basically Immich just flattens the hell out of the image. MacOS can display my image "correctly" even though I don't have an HDR display. Nothing is wrong when I do that other than the fact that HDR elements don't pop out like they would on an HDR display. Immich doesn't do this and just makes the image very washed out in comparison. When I download the image, it's fine though.