It happens on occasion. Yet to see it become a problem.
My boyfriend saw it for the first time just this week or last and showed me. We debated: to shake or go in and out of a building? He shook it. All three pieces of fruit fell.
I have seen similar before in my town, but the only difference is that I actually found a fruit on the ground (The top fruit of one of my mango trees was missing and I found a mango next to the tree [not sure how that is possible though]).
Why? Seeing a glitch the first time, no matter how insignificant, can really worry some people about the health of their game.
If you don't have any other reason for not wanting to see a thread, you could always not comment, not read it, and let it die a natural death. Like I didn't do here.