I have a question about the Arch Mage's Staff and its special magic effect, "Procs: Disease".

I've been using this staff for quite some time now and have tested it extensively on various monsters. After a significant number of hits, I have not yet seen the "Disease" effect trigger. I haven't noticed any visual indication of the proc, nor have the monsters appeared to be affected by the corresponding debuff.

I was wondering if this feature is working as intended on the server. 

tested today. appears to be working