[Raspi4 13.2] Keyboard woes

Good morning,

ran into this when I needed to fix a thing in singleuser (ended up
reinstalling and reconfiguring the whole system):

- keyboard is usable during U-Boot
- keyboard is usable after FreeBSD's up
- keyboard is NOT usable in between

This prohibits entering single user mode upon boot ("press any key", you know
the drill.)

I couldn't find a thing in the issues, or googling.
Is this a known issue, and is there a workaround?

Platform is Raspi4 with 8Gigs of RAM, OS is 13.2, from the RPI image disk.

Thanks for pointers,
                    Elmar.