The propane hose that came with my 22" Partner stove isn't a "normal" propane hose.
It has a small spring loaded pin in the end of the hose that attaches to the stove, a pin that has to be depressed in order for the gas to flow.
Normally, screwing the hose to the stove depresses the pin. If I look at the stove inlet, I see a "dish" shape with an off-center hole in it. The pin pushes against the solid center of this dish, and opens up - allowing the propane to flow.
The pin in the hose can be prone to damage, as it sticks out past the protection of the actual threaded sleeve that attaches to the stove.
Do you have a similar Partner propane hose?
If you do, is your pin damaged?
I have no problem running my 22" Partner off a 1lb disposable bottle.