Blowen fuse for fuel system

My 2012 with 38000 on it stalled while going 35 mph low oil warning came on pulled over checked oil and it was fine. Truck started and was fine for two days then went to start it and all it did was crank even after releasing they key.I had to turn the key to the off position to make the engine stop cranking. Had to have it towed to dealership they found a 20 amp fuse had blowen for the fuel management system. They couldn't find any cause for this no short or grounded wiring. Seems to be running fine now. Has anyone had same issue?