I'm reporting the issue here, so I'll not forget it.

The GNOME image debian-live-10.9.0-amd64-gnome.iso has per default the
automatic suspend option turned on. This means that after 20 minutes of
inactivity the computer will be put to suspend.
Perhaps I don't know kvm/qemu well enough, but I'm unable to wake my virtual
machine when it was suspended. This means that the work in the live image has
become inaccessible, and I need to do a hard power off.

With kind regards,
Roland Clobus