I have tried to finish the new exotic mission 3 times and every time I get to a point where there is no little triangle to shoot to bring down the boss's shields. I do everything I'm supposed to do but there is no way to continue the fight. WTF?!
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I'm hoping you've been able to do it by now, but if not then I'm more than happy to help!! I don't mind wiping to get passed the odd bug, so long as it gets done is cool with me!