Fluid
Pursuant to earlier post, any fluid flowing more rapidly in a pipe, undergoes a lessening of pressure, and a concomitant rise in Freezing point, even boiling point. This is the essence of "vapour lock", a not uncommon problem in liquid under presure supply systems. Once more, if the Fuel is Homogeneous, and temperature/pressure/flow parameters are met, it is easy to understand how any fluid could boil, freeze or restrict flow in a supply system. An HP pump would be the obvious place to suspect, as its delta P is more pronounced than in other locations/parameters. Throw in a maximum demand for Pressure/Flow (FADEC throttle "slam") on a low pressure stable system at low temp. Just Sayin'.