ALT HOLD activation causing RAPID CLIMBING 10m ! ( pulse to throtle )

ArduCopter Copter 3.3
1

HEllo , i have little problem with AC 3.3 on Y6B. ( pixhawk )

When i activate althold copter get big pulse to throtle, climb 10m . Then all work ok .
This problem coming ONLY in activation . Whats wrong ? Someone got same problem ?

2

@Petr_Zverina
Can you post a log. Is it only happening when you switch to AltHold or to any mode? If it happens in all modes, it can be related to the buzzer interfering with the Accels.

3

You do have the throttle stick in the middle, right? If you have the throttle stick up above 60% and switch to alt hold, it’s going to climb until you center the throttle stick.