Anointed corpses disappearing before collection

The crystal corpses of anointed enemies can disappear before being shattered for loot.
Playing in The Anvil (TVHM Mayhem 3) I had killed 3 anointed enemies but did not have a chance to shatter them for loot before the forth one killed me. When I made the very short journey back to where the bodies should have been. They were gone, no loot had dropped nor did it just appear in my overflow on Sanctuary.

They break automatically after some time if you don’t break them. But they should drop loot in that case also. At least they dropped for me.