The same with: 4.19.0-4-amd64 #1 SMP Debian 4.19.28-2 (2019-03-15) x86_64 GNU/Linux QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-7) and
Windows 4.0 sp6 workstation.
This guest worked in virtualbox without issues.
The same with:
4.19.0-4-amd64 #1 SMP Debian 4.19.28-2 (2019-03-15) x86_64 GNU/Linux
QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-7)
and
Windows 4.0 sp6 workstation.
This guest worked in virtualbox without issues.