Bug#984426: Confirm Bug#984426

[Dr. Bernd Zimmermann]

Hey,

I can confirm this bug.
After apt-get upgrade from deb10u3 to deb10u4 and reboot, system boot hangs und 
grub must be
reinstalled via rescue-system.

Seems to be the SAME bug as a during the last failed upgrade a few months ago.

Regards,
Bernd