The mystery of black parents giving birth to a white baby

I do believe in miracles but the logic behind black parents giving birth to a white baby and the vice versa is something I have never really comprehend.
In most instances, cases of infidelity come up but some of these couples swore that they have never cheated. Genetic scientists who do not believe in miracles can’t even seem to have an exact explanation as well. There was a couple in Nigeria who gave birth to a white boy and that has been a mystery up to now. I personally can’t explain this mystery since I have no enough knowledge of genetic science but what I do know is that it is a complete enigma. If there is someone out there who can help figure out this mystery please do; it would be of great help.