Description of problem:
- During boot compute node is not booting with latest kernel: 4.18.0-305.76.1.el8_4.x86_64 having index:0, but booting with older kernel: 4.18.0-305.49.1.el8_4.x86_64 with index-1
- grubby configuration shows that the kernel booted should be 4.18.0-305.76.1.el8_4.x86_64
- This is UEFI based setup.
- The latest kernel is selected in two conditions.
A.) When latest version is selected manually during grub prompt.
B.) In the  grubenv.rpmnew -> ../efi/EFI/redhat/grubenv[1] which has saved_entry has  saved_entry=9a297d8fa6df92258e47f64024c09d0e-4.18.0-305.49.1.el8_4.x86_64. If this entry is  edited and removed rebooting the node gets to the latest kernel. 

Customer fixed it by checking and following: https://access.redhat.com/solutions/4326431

# grubby --default-kernel
/boot/vmlinuz-4.18.0-305.76.1.el8_4.x86_64

#  grubby --info=ALL | grep title
title="Red Hat Enterprise Linux (4.18.0-305.76.1.el8_4.x86_64) 8.4 (Ootpa)" <<<<<<<<<<<<<<<<Index 0
title="Red Hat Enterprise Linux (4.18.0-305.49.1.el8_4.x86_64) 8.4 (Ootpa)"
title="Red Hat Enterprise Linux (4.18.0-193.64.1.el8_2.x86_64) 8.2 (Ootpa)"
title="Red Hat Enterprise Linux (0-rescue-9a297d8fa6df92258e47f64024c09d0e) 8.2 (Ootpa)"
title="Red Hat Enterprise Linux (4.18.0-193.51.1.el8_2.x86_64) 8.2 (Ootpa)"
title="Red Hat Enterprise Linux (0-rescue-0a3a9377748d4006be2bf2764fc6d219) 8.2 (Ootpa)"

# grubby --default-index
0

**But, uname  shows Index-1**
# uname -a
Linux hostname.xxx.xxx 4.18.0-305.49.1.el8_4.x86_64 #1 SMP Wed May 11 09:47:48 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux
#

**The kernel version is changed in grubenv also**
$ cat /boot/grub2/grubenv
# GRUB Environment Block
kernelopts=root=UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx ro console=ttyS0 console=ttyS0,115200n81 no_timer_check  crashkernel=auto rhgb quiet  tsx=off default_hugepagesz=1G hugepagesz=1G hugepages=384 intel_iommu=on iommu=pt   audit=1 audit_backlog_limit=8192 random.trust_cpu=on pti=on page_poison=1 slub_debug=P
boot_indeterminate=1
boot_success=1
saved_entry=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-4.18.0-305.76.1.el8_4.x86_64 <<<<<<<<<<<<<<<<<<

Version-Release number of selected component (if applicable):
RHOSP 16.2

How reproducible:
Minor update from 16.1 to 16.2

Actual results:
Wrong boot entry in grub

Expected results:
Should boot with latest kernel

Additional info:
Sosreports and /var/lib/mistral attached to case