一个丢失的大头针不起作用的动画

When I drop a pin on my mkmapview the animation works fine and the pin drops from the top of the screen as expected. I color that pin red because I haven't verified it. However, if I verify the pin using some code that is called on calloutAccessoryControlTapped I change the color of the Pin to green.When I drop a pin on my mkmapview the animation