Just got into this about 2 weeks ago, and really enjoyed it.
It is so much fun! :)
But today I experienced this pitch down and dive hard unexpected movements that my plane made.
I took off 3 more times, everything seamed ok, in the begining, but suddenly it happened again, and again. Luckily i did not crash.
Then it was time to check the logs. And i saw this. 6000m???!!!
Have you experienced such a thing?
At this point, i can not trust my APM anymore.
And it does feel bad. :(