FI, about a thousand years ago I lived in the same town as you and worked for a well-known engine maker!
When I asked the same question I was told it all depends on the piston areas and pressures within the engine, as the net gas loads on the blading even out. The engine air system allows controlled flows to provide turbine cooling, bearing chamber sealing etc and each area represents a piston area with gas pressure active on it. Some will act forward, others backwards, and as I recall there is no right or wrong way. The intermediate casing then takes the loads and transmits them through to the structure.
Engines can withstand quite major internal loads but from experience it can be almost impossible to calculate or measure them, because gas loads vary with altitide and seal wear. The one thing to avoid is the load passing through the zero point at any time as the main thrust bearings can then skid and self destruct in seconds.
Reheat does not affect the gas loads as the variable nozzle is choked so the engine doesn't see any change. At max dry the nozzle is pretty much running choked anyway.
If reheat fails and the nozzle stick open the fan would overspeed if the ECU didn't fuel back.