gnome-software improperly detects downgrade on debian

Hello,

It seems that gnome-software (3.34.2) is improperly detecting a downgrade

$ appstream-util vercmp 2:2.9+git20200213+877d9a0-1 2:2.9-6
2:2.9+git20200213+877d9a0-1 < 2:2.9-6

Also according to dpkg, 2:2.9+git20200213+887d9a0-1 is less than 2:2.9.0-8

$ dpkg --compare-versions 2:2.9+git20200213+887d9a0-1 lt 2:2.9.0-8 ; echo $?
0