In the “Air Superiority” update, Gaijin said this: P-39 (all variants) — the flight model of this aircraft has been completely updated according to the current capabilities of the physical model. Polars of wings, fuselage, empennage, and propeller blades have been recalculated and corrected. Moments of inertia have been corrected.
nothing has changed, did they forget? P-39 still has incorrect wing tip behaviour and questionable flaps.