Gameplay- Dunkmaster Darius skin mouse bug

Often when using Dunkmaster Darius, my mouse will lock into a red sword icon and I will be unable to right click on anything. Only by left clicking can I get the mouse to get back to normal. I haven't been able to reproduce it reliably, but it is QUITE frequent and happens at the very most inopportune times. This bug only occurs on the dunk master Darius skin (I have tested all of them). It's really a shame that I can't use the skin, it's one of my favorite skins in the game.

P.S.: I am using the Mac client, if that changes anything at all.