I learned thru the school of hard knocks about opening the tank slowly. I have a "spare" pig-tail as a result. Our symptom tho was no gas at all. The flame for a few seconds after lighting sounds like the regulator might be the culprit.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks