Preview: Some icons don't update reliably
On the latest version from Flathub not all icons update reliably:
The icons with the red rectangle are the ones updating correctly, the others are stuck on an old version. The issue persists across reloads, opening the file again, and restarting the app. If I copy/rename the file and open the copy, all icons look the same again.
This seems to be a new issue, I didn't see it when I last used the app about a week ago.