Not sure if it's a bug, or just something poorly implemented, but when you have an Arc soul from another player and try to shoot off a Nova Bomb, it instantly explodes because it comes out of your hand and immediately hits your arc soul in front of you. Did it 3 times in a row doing public events, and I had never seen it before, is this a known interaction?
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This is the first time I've heard of this bug. It might take a while for this to be patched (not because it's difficult to patch, but it isn't very known). Until then, either avoid arc soul rifts, wait until the buff runs out, or treat it like it was a melee ability.