Quadplane Mission strange behaviour

Hey guys,

We are trying to simulate our mission before going for the real thing however we are running into some issues.

When taking off in VTOL, after reaching our target altitude, we begin transitioning into forward flight and the throttle spikes then quickly drops ~23m/s to 13m/s (2000 --> 1150 PWM)

The rest of the mission is carried out at this speed (Almost as if it is in quad mode).

We have tried a similar simple mission that works flawlessly but this grid/survey mission is giving up some serious issues.

Simple Mission (Working fine): https://drive.google.com/open?id=0B87wV94OJ5sfZ1lqc2Fhb25JbEE
Survey Mission (Having issues): https://drive.google.com/open?id=0B87wV94OJ5sfYkV0aHBtUmpfeGc

Last log: https://drive.google.com/open?id=0B87wV94OJ5sfY2RteUdlTFRaLWM

Any insight is greatly appreciated :slight_smile: