Legacy FX not showing

I am finding legacy effects, with source light * strobe, nav, etc ( Even ASOBO
Ones) “SOMETIMES” dont show in Sim … the same FX file shows fine in one model
but fails in a different model for NO Obvious reason attached to Nodes/helpers
in Max and entered in systems.cfg as normal any help ??

This is using the Default fx_strobeh FX How on earth can this be illuminating
the aircraft and reflecting in the paint when it is Not Displayed ???