I have witnessed this couple times now. Me and my friend were doing shattered throne and in the ogres damage phase this happened. I popped my sentinel( code of commander) started blocking the blueberries and my buddy popped gg and shot the ogre behind my banner shield. Ogre took damage and the health came back full. And this have happened in other activities too. Somebody shoot celestial gg behind my banner shield: enemy tooks damage and 1 second after it gets all the health back. There is some weird bug in this combo. It would be nice If this get fix