Latvala tells in a Finnish interview
http://www.sportti.com/uutinen.asp?CAT=1-2&ID=343465 about the Poland retirement:
Which translates to "a wrong object had gotten its way below the throttle pedal. I tried to fix it with the clutch but it burnt because it couldn't handle the high engine revs"
So after all it was a human error rather than a pure technical failure. Possibly the tool kit under the pedals like Lefebvre on the last day?
On paper, maybe. But you could easily do the same with F1. Because the final regulations weren't set until end of 2025, things were changing every time. Well you know when engine regulations were...
WRC mainclass from 2027