I had nearly the same exact issue with Ford's 6.7 diesel. Not once but 6x on 6 trucks. $9600 each time to replace the entire fuel system with an identical explanation. We started selling the trucks as they were repaired as well as the trucks that hadn't failed. I started buying Dodge trucks and haven't looked back with virtually zero issues.
They all suck, it's a matter of which trucks suck less and finding a top shelf dealer to side with the consumer when the bean counters decide NO is the only answer on warranty.
On a side note, I sell Cummins industrial engines. We use the 4.5, 6.7, 9.0 and 15.0 liter engines. The 6.7 engine we use has the same fuel system as the trucks and I can tell you we never have this issue on our engines. I believe the problem is in the 1st fuel filter and lift pump that is installed by Dodge as a part of the truck. The pre filter and lift pump we use direct from Cummins CPP division is completely different and is subject to much more harsh conditions, especially junky fuel dispensed from sketchy mobile fueling trucks or tanks. The warranty admin and dealer are filling you full of bullshit excuses.
Listen to him guys. Cummins is a great engine, it's dodge that screws things up. I have three of them ( altho I like my ford better) and all the trouble I have is either before or after the engine. I've always said" if you need some spare dodge parts, look in the floorboard, some just fell off"
2010 Jim's Garage 4429
2012 Jim's Garage YJ
2013 Wide Open Design WFO