One wonders if the fuel temp sensor was reading correcitly?
Even if the tank fuel temp sensors used for flight-deck reporting WERE reading correctly,
one may wonder if their reported readings were representative of the fuel temps actually in the dir0 ect path of flow to the engines?
As one very experienced in precision temperature measurement, I know uneven distribution of temps in a large volume (of anything) is a near certainty.
If pockets of colder fuel were present in the wing tanks, perhaps already gelled and stratified into layers or globs of denser fuel materially colder than the tank fuel temp sensors could see, then is it not possible that descent-related changes in aircraft attitude and acceleration could possibly shift the coldest and waxiest fuel into the feed path at the critical late stages of descent, with exactly the consequences observed?
A relatively simple enhancement to flight-deck data might be to add reporting of temps IN the actual flow path near the engines. Likely some of this data is already sensed and available within the FADEC -- and possibly available in a usable form.