Well what kind of USB keyboard?
Just a wild hair, do you have the xboxdrv installed? It could be interrupting the connection.
Do you have any overlays enabled on the /boot/config.txt?
Are the lights illuminating for any of the devices?
@Efriim thanks for that info, i'll try it when i get back home later.
i'll report back.
Asking a human is not allowed on ANY forum...but asking an AI bot is okay