The group are currently in Florence filming the fourth season of the hit MTV reality show and were due to film season five in Seaside Heights in August.
However, 495 Productions has decided that they will travel straight to New Jersey from Italy at the end of June, even though they only packed for one trip.
This could cause problems as the Jersey Shore cast have already booked lucrative club appearances throughout July, TMZ reports.
The group apparently want a break in between seasons, with sources indicating that they could collectively strike like they did while negotiating a raise for season three.
The cast members are each thought to be earning $100,000 (£60,000) per episode for season four.
Jersey Shore begins its fourth season on August 4 at 10pm ET/PT on MTV.