Corsair k70 mk2 rgb - lights work but button presses are missing

I noticed that with SignalRGB running, I cannot use the #~ key
This is for the UK keyboard - it seems that the scan code is just ignored. Obviously this is an important key!
Screenshot 2023-08-18 113956

well, the light is working on that key but the key press value is ignored when signalRGB is running.
What is wrong?

Good evening :wink:
I have the same issue on a Corsair K95 RGB Platinum, but with my azerty keyboard it is the * key (close to the return key, the same as your #/~) that is not working.
With signalRGB off it works.

Go to Devices, keyboard, settings and set layout to ISO…