From what the below video suggests, it might be a "choke" piece that's on the motherboard that connects to the keyboard? He said that the keyboard works like a USB keyboard for the RGB to work, and that's why it's prone to failing, because it's under-rated?
https://www.youtube.com/watch?v=vDsP1--ttQc
Not sure why the problem is limited to a few keys sometimes. If its the same issue exactly or not. I'd guess they are though, as on a spectrum of annoyance.

That man. How long have you had it ? sounds like keyboard failure. Maybe a temp solution plug in a external one in the mean time until you figure out what you going to do ? 

It’s been like this only recently( a month) and found out the top row (qwerty) are not registering sometimes

@Shady_Ehab​ Did you look into buying a new keybboard or getting a price on repair ? 

The same problem with the keyboard after heating the w key sticks after heating. I tried reassigning the w key to e and it also started sticking when holding it down for a long time when the laptop is hot. Even sometimes you can hear a click as the button falls off

I have exact the same issue. Keyboard was already changed. Around 5 months it was ok … now same issue again.

iam in connection with the dell support, and they are rlly engaged but till now… no change.

its just the W key. All other keys are ok. Iam very frustrated and at this point… sadly… and when this dont end lucky for me as consumer… this was the last dell Laptop bought.

Did anyone got it solved? 

I am also facing the same issue.

Thanks