magic mouse not connected when using boot camp

Using iMac 21.5 running win 10 (via Bootcamp). Win 10 shows the mouse as "connected". Magic Mouse 2 is not responding after boot up. To temporarily fix this, I remove the mouse in Win 10 Set up and then reconnect it. Mouse works fine until the next boot into Windows. The iMac keyboard works fine. Is there a fix for this? Or is this a known problem and Apple/Boot Camp are working on it. Sign me as "new to Mac"