Gran Turismo 7’s latest patch breaks a key feature

techradar.com:

A number of Gran Turismo 7’s license tests and missions are currently proving impossible to beat after the game's latest update introduced a curious new bug.

If you’ve been pulling your hair out trying to get gold in the game’s dirt license challenges – including the one lap time attack S-5 test – it turns out that the last GT7 update incorrectly changed the recommended tires that were previously needed to beat the best times, which has left many players scratching their heads.

The bug also impacts a number of missions and circuit experiences, essentially halting players' progress until a fix is implemented. That's particularly frustrating if you're working your way through Gran Turismo 7's trophy list.

The good news is that the tires bug is a known issue, as highlighted on Gran Turismo’s website, and developer Polyphony Digital has said these issues will be solved in a future update. However, there’s no point attempting these challenges right now, as you're only setting yourself up for failure. The licenses, missions, and circuit experiences affected by these issues are as follows:

Licences

Missions 

Circuit Experiences 

Broken challenges aren't the only issues that the latest Gran Turismo 7 patch has introduced, however. Sometimes car settings cannot be edited, and decals applied in the Livery Editor can fail to show. There are also currently a number of issues with multiplayer lobbies and spectator mode, which will hopefully be ironed out soon.

Using the wrong set of tires might not sound like a big deal, but they can make a massive difference in Gran Turismo 7 when it comes to recording the best lap times, particularly on the game’s slippery rally tracks.

The only solution right now to this problem is to ignore these