This may be a completely stupid thing that is easy enough to solve, but sometimes my keyboard layout changes randomly. One moment I will be using the standard layout (for example ctrl z=undo) and then the next everything has changed (ctrl z=save). It seems I must be pressing a hotkey or something, but I’ve had a quick look around and I can’t find anything on this. I can put it back to normal, but it means restarting blender, which is just a bit annoying 
Hopefully I haven’t made a complete fool of myself, but if anyone has a solution it would be very useful 