Space navigator resets after sleep

after my computer comes out of sleep mode my space navigator resets all the settings back to default. i have some of my axis flipped and the speed is turned down a little so when i grab it and its back to default its all over the place and hard to control. if i shut down rhino and restart it then its fine. i can also go into the mouse software and hit recalibrate and it will be fine after that as well. is anyone else seeing this or have any ideas? coming out of sleep mode it needs a refresh or something.