Performance bug - Audi S1 and Hockenheim

The other day while running the Rally Heroes championship, I noticed that on Hockenheim full in the rain there is a severe graphical stutter while driving the Audi S1 Quattro. It is only in this car and only in cockpit view. I know it’s not my system, because I tested another car on the same track, with the same conditions in Free Play and didn’t experience the problem. Nor did it occur on any other track with the S1 Quattro.

Has anyone else experienced this or something similar?