Numpad backlight stops responding

I’ve noticed but have not figured out what the cause is if any or what might reproduce it, but i will suddenly find when i want to turn the numpad backlight on or off it does not respond even if i’m pressing the numlock key to switch modes if i wasn’t in the correct one.

The only way I’ve been able to get the light to respond each time is to quickly unlatch the trackpad and slide it out enough so power is automatically cut to all the devices and then slide it back in and latch.

Then the numpad light responds with no problem on or off, switching modes, etc… until randomly at some point it appears to happen again.

Has anyone else noticed any behaviour like this?

Yeah, mine pulses off and on slowly. Sliding out the track pad did the trick so thanks for that!