Since the latest patches, horadric caches have been dropping the same quality of loot regardless of difficulty.
What I would like to know is that if each horadric cache acquired has its loot table bound to the specific act they were acquired from.
For example, say I want to farm for Gloves of Worship, an act2 bounty-only legendary. Would I be able to acquire it from an act4 horadric cache but that was opened in Act2?
Or would I have to, instead, farm bounties from Act2 or Act4 only?