"The auxiliary
flaps, the innermost section, only have two positions, retracted and extended. They will extend fully when the FLAP
handle is at more than 5° extension" i think this the reason why even lowering the flap lever a little bit will cause it to jam. but at the same time i understand the frustration of not being able to deploy them in combat at all (even at low speeds). the current jamming mechanic seems to be very punishing but maybe it is real after all.