Anker A7721 Keyboard Function Key Locked iOS

Hello world! I’ve been using the A7721keyboard with my iPad for months now and it works like a dream… until today when the Z,A,S,D and the Function keys all appear to have stopped working. Without holding down “Fn” if I press “Z”, the keyboard will immediately go into pairing mode. This leads me to believe that somehow I’ve triggered function lock and can’t get it to come out of it! The issue persisted when I paired with my Mac and with a PC. Any help would be greatly appreciated!