I'm doing some photography for a local golf course tommorow , so today I decided to send my drone up just for a couple of minutes to practice some camera angles. So the battery was quite low (20%). I noticed last week my controller took a knock and might have dislodged something within the antenna but the wire did not break. Anyway as soon as I sent it up about 25 mtrs it started veering away by itself in a complete opposite direction . I quickly pressed the return home button at which point the drone hovered for a couple of seconds in the air and decided to lower itself down on top of a roof about 100 metres away. I then tried to manually bring it back but it did nothing until I lost signal camera cut off and I could not see drone. Luckily a half hour later I found the drone at the side of a house a neighbourhood away, with only two broken propellers. Cleaned it up and it's as good as new, but as a relatively new flyer can anyone identify what could have went wrong . I feel something is wrong with antenna as I am losing range after like 100 metres ?