I'm pretty sure I know what's up here, I've had it happen to me on my jd. During that point of the game all drops should be up blocking the subway, thats why it's freaking out trying to reset the to all up position. If you look carefully at the D drop target its standing a bit taller than the others. Its slipped out of the lifter assembly. Lift your table and examine with power off. You can manually drop and reset them now and you should see the problem clearly. Focus on the D target. You can gently tweak it back into target slot or just remove the whole works and rebuild it. Good luck!

Indeed, that's when I noticed it on my pin. The logic sees the targets go up on reset but as soon as reset plunger drops the D is no longer is sight of target up opto, which is important at that time to the logic.