This is fixed in 4.19.0. This is the patch: https://gitlab.xfce.org/xfce/xfwm4/-/commit/4f375ddfac5a58c67835ff97c3e12700d46351dc
- Bug#1026884: xfwm4: Reserved space through _NET... Sébastien Dufromentel
- Bug#1026884: xfwm4: Reserved space through... Yves-Alexis Perez
- Bug#1026884: Re : Bug#1026884: xfwm4: ... Sébastien Dufromentel
- Bug#1026884: Re : Bug#1026884: xfw... Sébastien Dufromentel
- Processed: Re: Bug#1026884: xfwm4: Reserve... Debian Bug Tracking System
- Bug#1026884: Fix Available Gary van der Merwe
- Bug#1026884: marked as done (xfwm4: Reserv... Debian Bug Tracking System
