So, I've noticed that whenever you go into the Cash Shop by pressing the Shop button at the bottom of the screen, on the chat bar, it'll say that a Quest has arrived and you need to double-click it. This doesn't really affect anything but in my head I always think: "OMG YAY A QUEST! ." OR "I KNOW I DIDN'T GET A QUEST! WHY ARE YOU SHOWING ME THIS
The only time I've had this happen was for Job level quests for first job. The beginning "training quests"- when you ignore them/ignore the lightbulb and then go into the CS and back out it opens up again. It did that in GMS though, I believe. I can explain better in the morning if needed. I have a level 11 warrior who I haven't accepted the training quests on yet- so they still pop up whenever I log in on her. (She's just a storage account XD)