BIOS boot options not taking effect?

Hi,

When I select the boot time out to be > 0 seconds, or selecting “First”, “Last” in the boot order. I seem to get the same behavior as default. That is the laptop still pretends to have a 0 second timeout, and boots up the first item. Is this a bug or a known issue? or am I doing something wrong?

For me to select the OS to boot into, I have to repeatedly bang F12 during boot and then I can select the proper OS.

I have full disk encryption turned on for both Windows/Linux, so the other route of using Grub, etc. is not viable.