A few days into a week long trip, I had a canister develop a slow leak when the little valve didn't close completely.
By the time I discovered the problem ("what's that funny smell coming from my pack?"), I'd lost most of my fuel.
Cut the trip short, since my dinners required cooking, and wood fires were prohibited.
This was with a recently-purchased, well-known brand name of canister (which I don't recall now), and a nearly-new Snow Peak stove. And no, I'm not particularly rough on gear. I'd been using canister stoves of one kind or another for about 20 years at that point.
I switched to Esbit.