Happen the same to me but i don't know how. I noticed it because after opening my phantom and mounting back the cover, the right bottom motor was not in the center of the cover hole and was close to one side very very close to touch the cover hole with all the risk involved. Moreover, as this thread title, the bottom right prop was not aligned to the near props.
Here is my tale.... It was a cold and dreary day. On my third battery, which is also my oldest battery, I flew fairly far...happy with my Itelite antenna set up. Coming back, the battery was depleted faster than I anticipated. This triggered auto landing (a setting I have since changed). It landed in a bush and it looks like the props were still struggling to turn. I should have done a combined stick motor shutdown, but honestly I was a bit flabbergasted and more concerned with retrieval (I used the Find My Phantom from my FPV booster app...led me right to it from over 1500 feet away). In any event, I believe the struggling motor kept at it, overheating and twisting and turning and thereby deformed the plastic mounts. This motor was non functional, and I replaced this motor and ESC. One of the other motors wasn't turning as freely as it usually did, and this motor and ESC was replaced as well. I replaced the shell. All parts from eBay for about $100. It actually was very educational to do all these repairs and electronic transplants. I ended up with a brand new looking drone. And flies just the same!
