I downloaded the Cosworth software to dig a little deeper into the PDR data. Throttle is showing 100% during the surging, so at least the computer is seeing full throttle input.
Temps all look pretty good considering the hot conditions.
What I found interesting was the inconsistency of boost pressure from lap to lap... FYI, lap 4 is the lap the clip in the OP was taken from.
Even with traffic and varying lap times, full throttle occurs in every lap, but boost pressure varies quite a bit. Has anyone looked at their data? Seeing something similar?