As I posted in this thread, Leech is ticking 4 times, while Wither and Decay are ticking 5 times. All 3 tic on cast, but Leech tics on its final second, while Wither and Decay do not.

I'm not sure which is bugged, but I presume all 3 skills should tick on their final second, or not tick on the final second. Which is the case?