i use a logitech k270 keyboard and mouse for several years we had power outage for a couple of days now the keyboard is nuts the mouse works i get odd multiple sequences with a few, not all, keys if i type "ls" i get "l7s9u" space is "[ " there are a dozen or so other keys that are screwy this machine is running bullseye i plugged the dongle into a machine running bookworm and the same i got to a console via ctrl+alt+f1 and the same keyboard has fresh batteries