I can say that this affects EVERY recent keyboard. A friend got an older build, where no newer firmware is available and his FW version differs A LOT. He got no problems.
I've got at CH-912A01A-DE with iCue 4.32.129 at firmware 1.11.34.
Windows 10 up2date
Polling rate is at 1000hz and i don't dare to change that. Keyboard is plugged to a USB3 Hub, because this kinda lowers the frequency of the problem.
The problem occurs no matter if iCue is running or not.
I had the K100 before and returned it mid december. At that time i had the latest firmware and ran the latest iCue software. The problem occured daily in the middle of a game.
With the replacement K100 i'm sticking to firmware 1.11.34 (latest is 1.11.39), latest iCue and a usb hub between keyboard and mainboard. Now the problem only occurs every 2-3 days. Problem is the same: Keyboard stops responding, led's are stuck to the last color (no animation anymore), repeats the last key endlessly. Only un- and replugging the usb cable resolves this problem.
This is one of the most expensive keyboards on the market. Stop making excuses, talking around the problem and deliver some value. Such a fail could easily end a company