BTCC - 2022 Hyundai & Toyota fuel mixture bug

Only Hyundai and Toyota can set the onboard fuel mixture up to 7/7.
The video is from a practice session (online), but I haven't checked if I have these symptoms in all sessions.

Version
Hyundai: v1.35
Toyota: v1.47

 

Wiki says the 2022 Toyota uses the new M-Sport engine(replaces Swindon) while 2022 Hyundai stayed with Swindon so engine differences should not account for those differences.

 

2021 is a Swindon engine, and 2022 is a Hyundai engine tuned by Swindon.
Fuel mixture "7" is a mixture for P2P, and originally it is a value that cannot be selected in the onboard mixture setting.

 

I was able to set the 2021 Vauxhall to 7

 

The 2021 don't have P2P do they? Are they blocked from mode 7 or can they all use it?

 

I have tested this with the 2021 BMW 330i and the new 2021 Astra. On the setup page the max value is 6. But onboard you can go up to 7.

 

Obviously these cars will NEVER be sponsored by Spinal Tap!