Hello,
This behavior sounds like turtle mode may be engaged. What are you using for a controller?
If it is a zorro blue the turtle mode switch is in the top left. As a general rule of thumb all switches should be away from you prior to arming. Controls have changed slightly since the guide on the docs page has been updated. I am working on updating them now. For now, please see the image on this forum post for current control mapping.
Hope this help,
Robbie