Not Judgin just sayin'
So why would both engines protest at the "same time". If the Fuel is homogeneous, separation or "isolation" of supply to each powerplant accomplishes nothing if the "problem" exists in both supplies. What would cause a chronic and consistent "starvation" or "restriction"? Additive that allowed water to be in solution with Fuel, something like Alcohol? Angle of attack, causing a reduction in pressure in both fuel systems at the same time, but one engine, being "hotter", reacts five seconds later? Whatever the outcome of the report, I don't see how anything other than a Fuel scenario could have escaped the scrutiny of this prestigious website.