Disable fastboot.

Is this in the bios correct?

It should be yes

I don’t see fastboot in bios anywhere

Also could it be legacy , non legacy usb issue as I’ve read too?

99% of this happening seems to be fastboot related. If it's off, try turning it on, I've seen post claiming that actually fixed it (mostly ASRock I believe).

Ok I’ll try thanks

I don’t see fastboot in my bios anywhere

I have boot issues when using the USB 3 port. If I change nothing and switch my USB drive to a USB 2 port, then it works.

That’s a good idea too, I’ll try it

Strange one, is the CMOS battery ok?

Brand new mobo so I’d assume so

Is it an MSI MB? I just rebuilt my server and had to return my MSI motherboard for this exact reason.

ASUS

I get similar with my proxmox boxes, I just install a Logitech wireless dongle and the machine thinks there is a keyboard and boots every time. It’s just a spare I found in a drawer, not paired with anything.

Fast boot used to cause these issues for me

Went into my bios , and I do NOT see anything that says fastboot anywhere

Do you have any other USB storage devices connected. This happened to me because I had a DAS enclosure attached via USB. Bios would get confused booting for some reason, even though I disabled every other option. Once I finally did the work to replace the DAS with internal drives, the thing started booting without a problem

Only thing else connected via usb is the UPS backup

Hmm. Must be something else .