UEFI multiboot control usurped with each kernel update

[Felix Miata]

With 3 distro installations on one disk, each OS as a kernel update is installed
updates NVRAM to make its entry in the ESP partition top priority. How can I
stop that from happening, so that my choice of priority remains first instead of
me needing to remember before shutdown or reboot to run efibootmgr to put it
back like it was before the kernel update? I don't want to prevent the update
from creating a new /boot/grub/grub.cfg, only from usurping boot priority.
-- 
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 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/