Sorry it took so long to reply. "Shanghai Chest" is the only Chan film I have that I noticed such a cut. My DVD versions of "The Red Dragon" and "The Chinese Cat" correspond with my old VHS copies.

The first VHS copy of "The Black Camel" that I bought years ago on eBay omitted the crystal ball scene between Tarnevarro and Sheila, which I don't understand since it is important to the rest of the storyline. I think the DVD versions now being sold have the scene intact.