A bit of a strange one. I decided to tune a Lamborghini Muira at the weekend, and every time I tried to save the tune the game froze.
This is at the point of naming the tune in setup manager. The name “Forza” is still in the name window. I can’t even delete it.
When the game freezes, none of the controller buttons work until I turn off/on the Xbox. The controller home button then remains inoperable until I do a full Xbox reset.
This happened 4-5 times.
Randomly I have made another tune save since, for a different car, which was successful.