What do I need to do to reproduce this? Can you maybe share a short track file?
Sounds really strange. SSA gets the data from DCS via some internal interfaces. Usually every frame, DCS sends some data. If the frame rate drops rapidly, the stream of data might be interrupted and thus, SSA thinks the flaps stopped moving... But this is just an assumption...
@All: I just published a new beta release which fixes the afterburner effect for the JF17