Re: Omega: Assist the Hacker not completing

This is an old problem and was present in the Legacy version as well:

https://answers.ea.com/t5/Mass-Effect-3/Omega-DLC-side-quests-still-in-Journal/td-p/259728

Strange so, that I never had any problems with both quests, and I don't have a "secret strategy" to avoid any bugs, just played through the Omega DLC (Legacy) multiple times. So it seems to be totally random and I was just lucky, I guess.