Mine never jammed.
Only minor problem I had was disconnection when working with a Univalve and the pole collapsed. This happened when pulling on the hose to operate the Univalve. If the black sleeve came right out of the pole it would sometimes catch on the way back in and cause disconnection. It was rare though, and I would just reconnect, no problem. It is a good kit.
I don't use the exceed kit now though, just a JG hose connector at the base of the pole. I still occasionally get a disconnect though less often.