Sorry for the late reply.
Can you record a vide with demonstration of the problem so we could test it please? Or provide a detailed step-by-step scenario on how to.
No, I do not use KDE/Gnome. In past I was using Mate desktop environment, but I replaced it to tiling window manager as I did not use the desktop and needed better performance and battery life on my laptop.
I downloaded the ISO of Debian 10, made bootable USB stick then I use the installer to install it. Later on I made distro upgrade to Debian 11.
If you have any way to collect more debug information, then let me know how I can do this in order to give you more details.
Unfortunately, Desktop Editors app is not adapted to work with mentioned spectrwm window manager, so to use it I’d recommend you to install KDE or Gnome.