Problem during auto takeoff

Hi I'm having some problem. mY quad works fine in stabilize, alt hold. loiter and RTL. It also works well in auto mode but the problem is while taking off in auto mode at first it deflects at pitch direction then come very quickly to the starting home position and then starts climbing. why this is happening ? I have loaded the course inside my house. I think where I load the home position in flight plan and where I placed the quad is not the same place. is that is what creating problem? please help

also my quad takeoff at very close to 50% throttle. so I left the throttle mid to be 499 as the default value.

here is the video link. notice during takeoff the quad simply don't stays in one position. it tends to deflect in pitch direction. please help me finding the problem. frowning  why it not taking off the ground vertically?

https://www.youtube.com/watch?v=eOjo8cvig68&feature=youtu.be 

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  • Moderator

    Attach a log file and never allow people to stand so close to the platform at take off.

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