Recently after the newest set of firmware updates to both the Z3 mouse and swiftlink, whenever the mouse sits idle for more than 5 mins connection to the swiftlink drops entirely and will not reconnect until the pairing is cleared in the x1 software and the mouse is turned of and back on again. USB and Bluetooth appear to work just fine though. Also I've notice connection stability has gotten much worse as well, with some notable lag in movement as well.