For a jib to work properly, the jib luff must be very tight in most wind conditions -- although perhaps not so much on reaches.
Since the jib attaches to an thin aluminum bar between the hulls, you cannot get enough tension. If you get the tension you really need, it will only be for a short time -- the cross bar will break.., or bend so much that you will lose the luff tension.
To tension a jib you need more than to pull it and cleat it. You should use at least a 2:1 or 3:1 tensioner.
Check it out. Next time you are sailing up wind, look at the luff of the jib. It will be sagging way off to leeward. If the luff looks arced, it is not working.
if the luff looks almost as straight as the mast, it is working.
To stop the catching, duct tape the cleats, and then put a bungee cord running from the mast to each side of the boat as a preventer.
Good luck,
Rick