Pixhawk 2.4.8 full throttle à 50% after update

I updated my pixhawk 2.4.8 from version 4.0.7 to 4.1.1 on a new chassis (Tarot FY690s, 13 inch carbon propellers, ESC EMAX Blheli 40A with the removal of the 2 components which normally prevent them to work with the Pixhawks). Since the engines are running at their maximum speed when I am at 50% on the throttle stick. The 50 to 100% area has no more effect.
I have several times calibrated my radio (Jumper T16 pro V2), calibrated the ESCs, but I still have the problem of this ineffective zone.
I tried with another controller, an APM 2.8, and there is no problem, the entire throttle stick range works.
Is there a change to be made in order to regain normal operation?
Thank you in advance for your answers

Please explain your problem better. Do you have flight logs? Post them.