[Sideview] Hookshot breaks on HS Grab combos below HS-Only/HS-Ladder Combos

http://www.freewebs.com/masterpikachu/ZC%20Content/Test%20Quests/quicktest5.qst
This is a rather interesting side-view gravity bug...
The Hookshot breaks whenever it grapples on to a Hookshot Grab Combo that is directly below a Hookshot Only or Ladder or Hookshot combo. The head stays on the combo, but the chain and handle fall off the bottom of the screen, causing Link to get permanently stuck.