Severity: normal I am dropping this bug to normal, since it is just a virusal issue due to missing some an expose event causing the icons to refresh themselves.
It seems fvwm3 has a similar issue, if you want to follow up on this please use the github issue form in fvwm3 (fvwm version 2 is no longer supported upstream). https://github.com/fvwmorg/fvwm3/issues/818 If you want to follow up more, you can use that issue and the fvwm3 devs might be able to help track down the issue. If it gets fixed in fvwm3, I will see if it is possible to backport the fix, but as of now I can't fix this until it is fixed in fvwm3. jaimos
