Where did I say it should “unlock for no reason”… I was talking about the ADADs current vertical lock cone not covering the whole elevation of the ADAD. As such targets below that cone don’t get locked… A bug.
OSAs have the same issue, with the lock bracket being elevated, so something flying low will not be locked.
Im guessing the HE filler was either a bug (since its 3 projectiles not 1) or compensation for the lower likelyhood of an actual impact.