Turnigy 9x Failsafe problem

 hi, i got a problem with the turnigy 9x transmitter and the ia8 reciever. (https://hobbyking.com/en_us/turnigy-9x-9ch-transmitter-w-module-ia8-receiver-mode-2-afdhs-2a-system.html)

i use it on a race quad with naze32 rev 6 and cleanflight.
the failsafe doesnt work, no matter what i set in failsafe settings of the turnigy 9x it will hold the last command. pretty dangerous for racers!

can anyone help me?

Thanks a lot!