Boot Manager doesn't display on cold boot

[Vertigo]

Got a weird one here.

Have a dual-boot set up with two Windows 11 OSes. This was working fine until yesterday.

Now, from a cold boot, it goes straight into my default OS without showing the boot manager menu at all.
Rebooting then shows the menu correctly.

This only started happening yesterday and, whilst not the end of the world, is annoying.
Anyone got any ideas why this might be?

 

[Vertigo]

Hmm, good shout but nope, didn't help.

Like I said it's not the end of the world, just means if I want the secondary OS from a cold boot I have to let it boot to the primary OS login screen then immediately reboot.

 

[Vertigo]

I think we might be talking at cross purposes. I tried the "...displaybootmenu yes" command and this enaled the BIOS "text mode" boot menu. I was never using this but rather the big blue screen with the boot options on it.

Anyway, I've managed to fix it but not entirely sure how. I think fast boot or some other kind of "restore" option may have been enabled in Windows such that, when I fully shutdown it was actually hibernating or otherwise saving the OS state so it can restore it quicker on next boot.
As such it just went straight into the last OS without prompting.

I've completely disabled hibernation and checked there's no other fast boot type options enabled and it seems to be ok now.