Are there any known problems with SC1268SG and Spektrum SR3100 DSM2 3CH Receiver when it is plugged to the throttle channel?

My problem is, when I turn the receiver on, the savox 1268SG makes a full turn to one side and then it goes back to the center position. As you can imagine this is not very helpful on the throttle/break side because it goes full the way to one side and this is much too long for my break.

When I but the savox on the steering channel it makes no movement when I turn the receiver on. The wired thing is, when I put my Vortex 2612HV on the throttle channel and turn the receiver on, it makes no initial movement and stays in his center position.
What I think, the savox 1268SG has a problem with the failsafe Mode of the Spectrum SR3100 DSM2 3CH Receiver. I set the failsafe server position to the neutral position but it didn’t change the behavior of the savox servo.

I also tried to reset and recalibrate my DX3R Pro but didn’t change anything.