"Connection Lost" for Magic Keyboard upon sleep wake up win 10

I recently re-installed Win 10 on my iMac via bootcamp, and get the message (pictured above) every time I wake up my computer from sleep or turn it on from a shut down state.

It is strange because while the message says "connection lost" I can still use all the standard qwerty keys to type (I searched for the snipping tool using my keyboard while this message was being displayed so I could capture it), however, the media keys (volume up/down, brightness etc.) on the keyboard do not work until the message reads "connected".

I am using the latest bootcamp drivers (correct as of 8 feb 2016), but before I was using bootcamp 5.X and this problem never occurred.

Is there a way to fix this?

Thanks for the help!