Yeah, it's not a bug. Don't know if it's an I24 or I25 thing (although I'm leaning towards I25) but anchor toggles like Rad, Dark and Storm no longer auto shut off when they target dies is defeated, but rather when it despawns. Some people are a fan of the change, others not so much.
Some other (possibly) related changes from the live version:
Kinetics' Transfusion and Transference (and any other power that spawns a pseudo-pet to grant its effect I assume) now work even if the target is defeated as the power activates. Personally I love that change!
Similarly, projectile powers launched by NPCs just before they are defeated like grenades and such will now actually damage you when they land, unlike on the old live servers.