I think that something is wrong with item affix chance to find a potion:
First of all if i stack it on items it does not show up in stat window(my chance to find potions there is 0, regarding of how much pots i have). But its just a minor thing.
When i have Bulwark node on forge guard that gives +200% chance to find a pot and i drink it, it actually shows in stat window 200% chance to find pot!!! Now if i use an item that gives chance to find a potion AND a passive it works AS A MULTIPLIER , so with 1 65% affix and 200% passive i get 330%. not 265% chance to find a potion shown in my stat window.
The last thing is that passive actually gives much more potions than pot affix, i tried on my lich 4 t5 chance to find potions which gives over 240%in total , and i could not sustain potion buffs in combat, while i can do it with forge guard with just 200% passive and no items.
Please look into it, and hope you can buff how this affix work on items, cause sacrificing 4 prefixes for 240% chance is quite a heavy investment but it feels like it barely does anything, i ran out of potions if i use 1 pot every 4-8 sec on arenas with high density.
conclusion: i think that there is some hidden base chance of finding potions and the affix works multiplicative with it, thats why i get 0 in stats, cause base chance is 0 and 330 instead of 265 with passive. Hope its a bug and it should work additively not multiplicatively