I’ve had the Spark since Christmas. Yes, I’ve had a couple of minor crashes, nothing serious. But I recently notice when landing that the left rear (when facing me) stops faster than the others. I spun them all manually and that motor seems more tight or stiff than the others. I’ve read some post where the users could tell there was an issue when flying it, but the only way I knew was upon landing and that blade stopping quicker than the others. Just curious, should I worry about this. It’s my first drone, so I’m still learning.