@contrasena
The text says: "Chapter number 54 seems to have been skipped"
So it's unlikely the translator did it.
Also, chapter 55.1 looks like it follows directly after chapter 53.
Maybe 53.3 and 53.4 were actually supposed to be chapter 54?
This would be consistent with the remaining chapters, which so far have always been either a full chapter, a x.5 spinoff, or split into x.1 and x.2, with only 53.3 and 53.4 being different.