Upon travelling to the oracle to use my offering, I noticed that the obelisk still said Present Offering for me while my friend said he didn't have the option because he didn't have an offering. After using the interaction again, I was given a brand new chest with loot. The obelisk still gave me the option to keep presenting the offering, without actually taking my offering.
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I can confirm this is still happening, with my Warlock character today. I don't want to look a gift horse in the mouth, but the temptation for abuse is strong... something something optimize the fun out of a game