Same. I created a post earlier and I see two people have reported on GitHub. Here and here.
As a workaround, I’ve been able to get it to work by clicking the post then clicking the image. It only freezes on me when I click the image directly from the feed in compact mode.
Is this on the main app? I think it’s been fixed on the TestFlight version so hopefully the next update should have a fix. I’m able to share/download images.