[Diagonal Movement] Door Repair Bug

http://www.freewebs.com/masterpikachu/ZC%20Content/Incomplete%20Quests/LOZ-Generation4.qst
There is a door repair on the world 9 map in this test quest. Normally, you would pay the amount of rupees set for the repair fee, but if you enter the cave diagonally from below while facing up, the door repair automatically drops your rupees to zero! This is obviously a bug with diagonal movement by the way.