Quad crashed when RTL

Last saturday I went to do some testing on my quad and I had an awful crash, this is what happend:

- Armed the quad with Mission Planner in Stabilize mode

- Moved the a few meters up and a few mts away south

- Switched to RTL

Then the quad went to the north at full speed slowly decreasing the altitude until it crashed.

I don't have a clue of what happend because, the GPS had a perfect lock, the altitude was correctly displayed, and the compass showed the correct heading, I'm just astonished.

This is what I use:

APM 2.6 fw 3.2.1

3DR 915Mhz Radio

3DR GPS

3DR Power module

HJ 450 Frame

Also use APM 2.0 RC1/RC3

What am I doing wrong?, ideas?

Cheers

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    • I'll see if I can retrieve them.

      cheers!

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