Now, I have stated this before in another bug-report thread, but this might be a more proper thread for it.
The Gitano retains it's original powercore despite an apparant jump in weapon power, meaning that it's unable to fire even optimal weapons continously for more than three seconds, unlike ordinary LF's.
Aet: Try re-buying it. Existing Gitanos would not get their current inventory updated. Ship power core is set on ship purchase time (as hidden equipment). If a new Gitano has this problem, post in bugs.