Ubuntu 20.04 does not boot (automatically) after update

[mahesh]

Problem has occurred after update on August 2021. There is logo Acer on the screen after reboot or power on, laptop is halted. Manually raising boot menu is needed to boot Ubuntu. Ubuntu booted automatically before that update.

fsck did not find any problem. Reinstalling grub did not help.

Laptop Acer, approx. 5 years old, UEFI.

Is it please possible to make Ubuntu boot automatically ?