My black hammer is maxed out but the green bar is still on the bottom like it is not. It should have a yellow/gold line around the whole thing but it does not.
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If you had a Black Hammer that was fully upgraded before Hive Disruptor was removed, the yellow box will still show around it. If you had a Black Hammer that did NOT have the Hive Disruptor per enabled before it was removed, you will not get the yellow box. Hopefully Bungie fixes this soon, because Black Hammer isn't worth using over Icebreaker through most of the raid.