Just had a B. G. O ( blinding glimpse of the obvious...):
We are at a RV park in FL- 2 days ago a landscaper was cutting sites behind us when we smelled something like rotten eggs or cabbage - never even thought propane, just wondered "what the heck did they cut". Now I am feeling foolish realizing that that was likely when the regulator let go, if in fact it turns out to be the culprit, which is highly likely. Luckily nothing burned, blown, or damaged. Sure adds up - strong smell + empty tank.....
2014 390RB-60 "The Shire"