I've had several occasions where a Pod got knotted, for example when returning from an app to the home screen it would pop up the home menu but any attempt to move down the menu would result in focus jumping back to the right. The only thing that would fix it was a power on reset, but one of my Pods is tucked away and hard to access.
I eventually discovered the reboot option:
My Hub > Android Settings > Device Preferences > scroll to the bottom > Restart