Want to know the contradiction between Andy Lau and Stephen Chow and its reasons?

As a fan of Andy Lau, it is my duty to tell you that they have actually cooperated in two films. However, when filming the second cooperative film "The Expert of Unique Skills", because the fortune teller approved that they could no longer cooperate, otherwise the consequences would be unimaginable, and the two never cooperated again. However, the two are still good brothers, but they no longer cooperate.