fixed-upstream: https://github.com/fvwmorg/fvwm3/pull/1208
The bug I was able to reproduce has been fixed upstream. Fvwm3 should now broadcast its title and icon title correctly to modules in the case you have identified. This will be included in the next release of fvwm3, though since we are in the freeze, it won't make it into trixie. If you would like to build a package locally use https://github.com/somiaj/fvwm3-debian jaimos
