Epicenter grenade bugged?

So am I crazy or are the spheres cast out on impact not doing any damage? I tested it on mobs, even tried it for setting myself on fire with Amara but the spheres just phase through her (ha) and don’t do anything, all the damage comes from the center explosion alone. Which yeah its called Epicenter, but then why have the spheres at all if they don’t do anything but confuse about the blast radius?