Why Nigeria Independence dove refused to fly in the hands of President Buhari?

A Facebook user shared the below post on his page and generated a lot of concern and comments.
Read below;

2015 dove refused to fly
2016 dove refused to fly

 For the second year running the dove refuses to fly

Why are the doves refusing to fly?
Father mbaka that used to see vision when doves refuse to fly has suddenly lost his sight and voice