I can confirm that this version (1.40) has addressed all my issues! Thanks for getting this fixed!

Aye, owner of a z15 keyboard here, I just got the latest driver and firmware updates, it's still disconnecting and or not being recognized by Windows from time to time, so nothing has changed so far. EVGA crew get your stuff together you can't be selling stuff like this when a freaking chinese knock off or some logitech cheapo membrane keyboard ain't having these issues, this is a premiun product we're talking about jeez.