a bug in the game

Dear Engineer,

I have encountered a bug in the game. While playing the 2026‑season Driver Career mode, within the powertrain development section for my Audi team, the crankshaft — the final component under supplier upgrades in the bottom row — remains stuck at July 15th. It cannot be unlocked even when the in‑game date advances to October.

This development item worked correctly in Season 1. However, it has failed to unlock ever since Season 2 and persists through my current Season 4. As a result, my car consistently suffers a noticeable performance disadvantage compared to AI‑controlled vehicles.

Could you please advise me on how to resolve this issue?