I have a small leak in a corny keg. I know my poppets are leaking but would that matter when the lines are connected. The pin on the disconnects are pushing down on the poppets anyway.
What's the difference between a gas QD attached to a keg with a perfectly functioning gas poppet vs one with a leaky poppet. Either way, the QD has to seal against the post O-ring, and the poppet has nothing to do with that. And all the same is true for the beer side...