That Lexus RC F Gr.4 tune was done in July 2018, so the updates over a couple of years may have mess up the transmission settings on the car. Jeje6410 has not played this game since mid last year, so he may or may not help you but someone on here may help you with the transmission.
@Jeje6410 I hope you are well, in these difficult times we are having around the world with this Covid-19 virus.
yes everything is fine my dear friend and I hope for you too. Here we are in containment. I can just go out to go shopping or to take the dog out. And still we are lucky because we are a region of France not yet too affected. And in Australia how is the situation? Take good care of yourself and your loved ones.