I just updated the game to the newest patch and since then I keep getting "New Quest" alerts when I loot things (barrels, bags, vases seem to be the main culprits; does not occur with chests), interact with objects (readables, doors), or collect items (maps, keys, opals/titanium). I check my quest log but nothing new has actually been added. I'm currently playing Siege of Paris, so I don't know if this is isolated to just this region. It's mildly irritating when looting multiple objects and the notification and sound occur for every single item.
The video shows this happening with doors.