Aye, between the slight gap in between the bottom of the switches and the PCB, and the fact that the plate is thin enough to be rather flexible, eventually the pads (and sometimes a bit of the traces that led to them) started to peel off of the PCB, causing loss of functionality. After a couple of months, I'd lost the use of Backspace entirely, and other keys were occasionally failing as well.
Though, if the problem with yours only occurs when it's plugged into Dells, it's probably a different problem.