RTL -> THR to 100 -> Skywalker Crash

@victole wrote:

Hi guys,

I had a strange problem on the last flight that caused my skywalker to crash.
At one point during the flight, I activated RTL and everything went well, when it got to home and started loitering, the throttle went to 100 and when it started to turn, it started to increase the inclination angle and started going towards the ground, at that moment i’ve passed to STAB to try to get it back but it was too late. Can anyone help me analyze the problem and try to find the possible cause?
Log and dvr record https://drive.google.com/drive/folders/1q8QMjBj4n85M8eUgbO_cQE2wdgJEry3X?usp=sharing

Auto analysis result
No of lines 861388
Duration 0:17:17
Vehicletype ArduPlane
Firmware Version V3.9.6
Firmware Hash a8568402
Hardware Type
Free Mem 0
Skipped Lines 0
Test: Autotune = NA -
Test: Brownout = GOOD -
Test: Compass = FAIL - Large change in mag_field (54.53%)
Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = GOOD -
Test: GPS = GOOD -
Test: IMU Mismatch = GOOD - (Mismatch: 0.50, WARN: 0.75, FAIL: 1.50)
Test: Motor Balance = NA -
Test: NaNs = GOOD -
Test: OpticalFlow = FAIL - FAIL: no optical flow data
Test: Parameters = GOOD -
Test: PM = NA -
Test: Pitch/Roll = NA -
Test: Thrust = NA -
Test: VCC = UNKNOWN - No CURR log data
start the issue thr=80% roll 13º

thr=100%

see roll º

Thanks in advance

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