Unless something changed last week and I missed it, my understanding is that raid chests are supposed to give spoils. I collected the first one in deep stone crypt on all three of my characters and didn't get any. I also grabbed the chest on the pillars in last wish on all three and again got none. I considered if this being my first time collecting chests on some characters was a factor but I'm certain I got the last wish chest on at least one character before.
Is this bugged for me then and not behaving the way it should?
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The secret chests in DSC no longer drop spoils because people farmed them; could've easily solved that by moving the chest to after Security but whatever. The secret chests in VoG do drop spoils, however, you'll actually need to complete the encounters first.