Hello, GrapheneOS seems to be unable to dim the background when dialog boxes show. I'm using a Pixel 6 and the latest GrapheneOS, and I think this issue is related to https://issuetracker.google.com/issues/289117017 as my issue has the same symptoms and workarounds.
Background dimming for dialogs not working
I'm running the same build number. Oddly it seems to show up when I'm taking a screenshot but not in the actual view.
2 months later
It seems like using the "saturated" color profile caused this issue for me