Confirming this does not happen to Ubuntu on the same machine, but does happen to Kubuntu. BTW: it does not happen when installing and then using it right away, but only if running an OEM-installation, then just rebooting and configuring or first pulling an image, writing back and configuring.
So I suppose it is somehow caused by the OEM configuration for Kubuntu.
Confirming this does not happen to Ubuntu on the same machine, but does happen to Kubuntu. BTW: it does not happen when installing and then using it right away, but only if running an OEM-installation, then just rebooting and configuring or first pulling an image, writing back and configuring.
So I suppose it is somehow caused by the OEM configuration for Kubuntu.