When we killed the final Boss at each alter, we were only given credit for 2 alter completions. The main final Boss never spawned and when the mission timer ran out it gave us a mid rank rating and some loot. 
We ran this activity a second time and found that if you kill the alter bosses too quickly the activity softlocks. We were able to complete the second run.
						
					
					
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	Hello there, Thank you very much for reaching out to us. I'm sorry to hear that you are still having issues with the event op, despite the fix applied in the most recent patch. We've received reports of this issue and are investigating the underlying issue further. For any updates on this issue, we recommend viewing our [url=http://www.x.com/Destiny2Team]X/Twitter page[/url] and our Patch Notes as they become available, posted on the [url=https://www.bungie.net/7/en/News]News page[/url].
