Odd that this is something that has appeared with use, so find it difficult to blame the rack or the tracking.
I'd check tire pressure as a first thought, possibly a slow puncture....or perhaps not enough grease in the suspension on one side and it is getting stiff?
If the tire pressure is OK then clearly the dealer needs to check the front suspension.


Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...