Found that one out after some digging, seems weird to me that AWT manages to screw this up, to this day, maybe I'll understand what cool trick they do which makes this a problem.
> I use these on OpenBSD as well without too much issue.
Portability is a major benefit of these little window managers, I even ran my dwm fork on Minix3 (on real hardware!), with some minor Make changes [0] as a bored teenager.