mortar and pestle/potion bag "locks" interface
 

After having misread the wiki, I was under impression than anyone could do the extract subcombine for fine plate dye, I was wrong, the bug I'm reporting is related, as a SK I tried to do the combine in both potion bag and mortar and pestle. both try report with a message like "only shaman can make potion" or "only rogue can make poison" which, unfortunately is to be expected. what is bogus is that, after, I can't open/close bags, pickup item, or click on my action buttons until I zone, it's like if I can't click anymore.