I've spent an unreasonable amount of time talking to various Apple support folks about a very annoying macOS bug that causes my external keyboard's layout to change in mysterious ways on an M1 Mac running Monterey. Anyone else seen this before? For me (British - PC key layout) it's causing the key to the right of shift (\\) to be swapped with the key to the left of the number row (`), and Keyboard Setup Assistant to recognise all key presses from external keyboards as key presses from the laptop's own keyboard 😕