Odds are that was a sticking OPD (Overflow Prevention Device) on the connector, rather than the regulator itself. OPDs are required on many consumer applications. Basically a little SS ball, a spring, and a few gas passages. A little condensation in there and the ball refuses to drop out the whole way, limiting your flow to less than optimal. Try blowing out the connector with compressed air and make sure to store it inside for increased life (especially true on a cheap one).
Every little thing is gonna be alright.