As stated I do not know what state the AP was in at the time, but (to my mind and based on the foregoing) there definitely seems to be potential for a faulty WOG switch to impact on the AP self test of the actuators.
only if the pilot was stupid enough to initiate the AP test in the middle of the PAC when light on the skids - unlikely!
I don't want to seem PC but the acronym WOG has a distinctly 70's racist undertone and could be replaced by another term.