With our KIWI images, when selecting an older snapshot in the GRUB menu ("Start
bootloader from a read-only snapshot" -> any entry), then the first entry "Help
on bootable snapshot #<num>" will be selected instead of the actual bootable
entry.

For regular users this will just be an inconvenience compared to systems
installed with YaST, but on automated systems, e.g. when using health-checker
to automatically select an older snapshot if the default kernel or initrd did
not boot correctly, this will break the boot completely - the system will be
stuck in the help text.

On systems installed with YaST,
https://github.com/yast/yast-bootloader/blob/53bed387ab933f635fa3c557716131643aa209a5/src/lib/bootloader/sections.rb#L48
will set the default entry by using the entry's name (e.g. "openSUSE MicroOS"
or "openSUSE Leap 15.1"). KIWI would need a similar mechanism to get this
working.