This sometimes happens to me if google chrome repo doesn't update for example.
Last time I did this it showed metadata erros. so a sudo dnf clean metadata fixed issue.
regarding google chrome repo it was because I was forcing https over tor at the time. and when it got updated it would keep reverting it back to http and then failing. I would have to keep changing it back to https for it to update and get rid of arrow.
In case of the metadata error. It was cause I had upgraded the template manually to new version and it must of cause some problems.
For default repos this shouldn't happen anymore like in old Qubes versions.
Is there any way to see what qubes the qubes-update-gui tool thinks there are updates for. Ever since installing Qubes 4.0 the gui has been telling me there is "updates available for 1 qubes" even when the gui shows there is not^1. Even manually selecting all listed quebes and running an update on them all does not get rid of this notice.Is there somewhere on the command line I can look to see what qubes-update-gui tool things needs updating and more importantly, clear it :-)