@TheYoctoJester
Yes, you are right thanks for the clue there is 2 reboots
1075:Jan 20 14:31:21 rc.local[858]: Please reboot
1077:Jan 20 14:31:22 systemd-logind[523]: The system will reboot now!
Its comes because I shrink my initial image using PiShrink and then used that image in mender-convert, PiShrink updates /etc/rc.local to expand the root filesystem on the first boot, then reboots to apply the partition and filesystem changes.
For more details found a similar issue faced by user and discuss in mender community https://hub.mender.io/t/there-is-an-extra-reboot-during-artifactreboot-and-it-causes-update-failure/3740/3?u=sushil
Thanks
Sushil