Copter jerks during Auto Mission

Short Test Mission with RC7.
Everything worked fine except of a jerk two times during the spline flight (at 73700 and again at 101000).
Mission planned with Tower Beta.

EMAX 3506 650 KV; 14x4,7 Carbon Props; 20A Afro Slim BLHeli; 4s 10 AH 10C Multistar
Pixhawk Lite; Drotek M8N; Graupner GR 16; 3dr Radio
2400 g AUW