ME3 Cannot turn in side quests to NPCs

I cannot turn in quest items for rewards in non-cutscene interactions. For example, when I take the Reaper Code Fragment to the asari strategist, instead of turning it in and giving the reward and non-cutscene dialogue, it plays the original pickup audio instead ( "...A Reaper code fragment! I'll see if I can take it along with me"). The same bug applies to other quest turn-ins of this style. Is there a way to undo this bug, or do I have to load a old save and lose the past 7 hours of playing, or worse start over from the beginning if all my saves are too recent?