Netflix did not push a software update to the film's audio track. Instead, (the distributor) likely allowed the license for the "Classic" English dub to expire. When Netflix renewed the license to keep the film on the platform, they were only given access to the alternate / secondary English dub —the one fans hate.

If you are a fan of early 2000s action-comedy cinema, you know the name Stephen Chow. His 2004 magnum opus, Kung Fu Hustle , sits on a throne next to Shaolin Soccer as one of the greatest martial arts parodies ever made. For years, fans have debated the superior way to watch it: Subtitled (original Cantonese) or Dubbed (English).

So, when Netflix acquired the film, fans rejoiced. But that joy turned to confusion when reports started flooding Reddit and Twitter with a specific cry:

Netflix frequently rotates content. When a film's license is up for renewal, the owner (Sony) may offer a "package deal." Sometimes, the original audio mix (the 5.1 surround sound classic dub) is owned by a different entity than the film's video print.

Thus, the "patch" was a cost-cutting measure disguised as a technical update. Here is the cold, hard truth: You cannot get the classic English dub on Netflix right now.