I have an XPS13 1080p 9350. The keyboard actually works fine but it is the only weakness of the laptop in my opinion. I don't have any keys that cause problems but the quality of the arrow keys on that laptop is really bad - one reason why I switched to vim keybindings by taking advantage of the TAB key. In terms of keytravel Lenovo laptops and Macbooks <2016 are much better.
> In terms of keytravel Lenovo laptops and Macbooks <2016 are much better.
This is such a sad statement about the quality of today's laptop keyboards. Of the laptops I can remember using the keyboard on the Thinkpad 701C "butterfly" was superior to that on the T20 and T42 in terms of key shape and stroke, and the T42 is superior to the X60. The keyboards on the (work-issued) Macbook Air 2012 and Macbook Pro 2013 are garbage by comparison.
In my more conspiracy-minded moments, I conclude that the overall trend towards garbage keyboards even on high-end machines is long-game industry collusion to force us all, eventually, into pure-touchscreen interfaces.
I glimpse the future every time I use my smartphone, and it is stupid.
Just a guess from someone who doesn't have an XPS but has experienced similar symptoms. Maybe there's some kind of debris or perhaps liquid in between the switch contacts for those keys. In my case, two plastic sheets comprised the contact surfaces and getting them separated and cleaning them with a damp cloth and drying them did the trick.