As an old IT person, I agree with @franz. I would start by doing a power recycle on the device itself and see if that fixes things. I've had to do it only once since I've had my controller -- don't even remember now what the issue was, but it fixed everything then for me.
We used to say that computers got hiccups sometimes, or that it's little brain just went temporarily wacky. And they were always the worst problems to diagnose, because you could almost never recreate them. Try the old unplug the device, wait 10-15 seconds, and plug it back in. Hopefully it will work correctly again.