Occam’s razor - There must be something about the keyboard that AL does not understand.
So - what type of USB keyboard is this? Anything out of the ordinary from any other standard USB keyB? Off brand? Drivers required? Additional features that might set it apart from any other?
Just trying to understand what makes this KB non-responsive in this situation.
EDIT: I re-read the original posting. Allow me to modify the above statements. What sets this system (USB ports) apart from other systems? Since you have tried other USB keyboards in the same system and none appear to work, does the same issue happen with USB mice attached to this same system when booting AL? If the USB mice produce the same results as the KB, then there is something about your hardware that AL does not see or understand.
AND, are you dual booting? Is Windows 10 installed. well - that kinda blows my line of thinking since you said other live distros work, so nix the idea that there is some secure boot thing going on.