Watched Quest window clears out...

[Callindril]

Started playing again, and noticed that every once in a while, more frequently than I'd like, the list of Watched Quests list will go blank and be empty...

All the buttons at the top still work, and it looks normal, just not listing any quests....

Sometimes if I complete a step in a quest, or collection an item for a step (like I get #12 rat tail out of 15), the full list will return...other times, it still stays blank....

Any thoughts?