I have to stand around and wait at least 5-10 seconds (the ring says every 1.2 seconds) for it to consume a corpse for “raise skeleton” to finally activate. None of my summons have died, so the only logical explanation is that this is broken. I think it has to do with other auto-consuming of corpses.
I only have priests on my bar right now, but I do have the legendary that makes my golem erupt and eats corpses to reduce its cooldown … the thing is, there are plenty corpses around me for the ring to consume.
When I had both corpse explosion and raise skeleton on my bars, it would kind of choose between the two, and so I took corpse explosion off. But the lack of raise skeleton still seems to happen.
Okay so I did a test: Activating golem and having it consume the corpses STOPS the ring from activating (for raise skeleton at least) completely!