Basically the quest starts and there is no dialogue or objective markers like there's supposed to be according to walkthroughs. The objective text states "Investigate Hive Activity: Head to Sorrow's Harbor and investigate the strange Hive congregations within," but nothing occurs if you head to Sorrow's harbor or kill enemies. It seems it's bugged in it's entirety.
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I just encounter the same issue, when I was trying to complete it on my Hunter. Quest says investigate hive activity and bugs out. Triggering the conversation in a tunnel towards the sorrow harbor is possible (not always) but after that quest bugs out.