Climbing Ladders/Ropes with Horoscope Sword (Staff) Equipped Causes Disconnection

Describe the problem. Be as specific as possible! :
Equipping a Horoscope Sword (Staff) and then jumping on a rope or ladder completely shuts down Maple, and leaves me with an error message. This issue only seems to happen with the staff version of the Horoscope Sword, and not the wand version. I've tried it in various areas (Magatia, Ariant, Leafre, Free Market), all of which have the same outcome. I was also disconnected if I equipped the staff while currently on the rope/ladder.

 Images of problem

Error code when disconnected :

do staffs appear on your back when you climb ladders?

I just checked with the level 25 staff and didn't see it. Not sure about any others - that's the only other one I have other than the horoscope staff.

There are plenty of problems with the graphics of the non-cash CS items. It likely calls for an image when it shouldn't, or something similar. Silly Nexon.