Why does Italian hyphenate words as /V.sC/ instead of /Vs.C/?

The Italian words "giustizia", "maschio" and "nostro" are separated as "giu‧sti‧zia", "ma‧schio" and "no‧stro" respectively.

This is unusual across Romance languages, who mostly pair up the preconsonantal S with the preceding vowel, for example: French "es‧prit", Portuguese "as‧fal‧to", Romanian "ăs‧ta" and Spanish "fies‧ta".

Even some smaller languages in Italy don't do this: Friulian "cjis‧cjel".

Why does Italian do this?