RPM Led crash / stuck

Hi, sorry for my english,

I use the  sim hub lite for test on Assetto Corsa and ACC.
Most of the time it works perfectly (95% of time).
Sometimes it happens that the led stays stuck on a redlight display when I have passed the next gear or braked.
It also happens that I arrive at the switch but the led display corresponds to 70% of the regime as if there was a delay.

How can I correct the problem?
Bad configuration maybe?
I just plugged in the arduino and everything was detected automatically.

Thanks