Yes, but it takes a significant leak for a quite a while.
Think how quickly a ballon deflates if you don’t tie a knot. Now think how long it would take if that ball on was hundreds of miles long. It takes a lot of gas to leave to lower the pressure below the “normal” low pressure cutoff.
I’ve been on sight for the purging of a new line prior to being put into service. In that situation, the vent screams at sonic limit for hours and hours.
Thanks for the reply thackney.