So there are 10 drones to be shot on Europa with the new pulse rifle Revision Zero. However my progress is stuck at 9/10 because i can't see the 6th drone. I've already shot it but it didn't give me progress for the triumph. Now it isn't there anymore and I'm stuck at 9/10 I've gotten the others and I'd hate to not get my sparrow Bungie!!! because no one looked into this bug. I have not seen anyone complained about it yet so I guess it's just me. Please fix.