Jaboticaba45,
I am not sure that there is a problem, but maybe the tree is a little low on Zinc and maybe Copper too.
Have you fertilized the tree since you got it? What is the soil like?
HonestAbe,
I have seen several trees with abundant foliar Mango Bacterial Black Spot, which trees never had it on their fruit--- and several trees with infested fruits and clean leaves.