I entered a quest that popped up a choice dialogue and at the choice dialogue I pressed escape. It aborted the quest choice, but kept the quest there.
If the quest choice was the first quest decision it will consistently show you the pop-up. (tested this with Quest_Restoration)
I also did this with the Quest_TheGhostHelm, where I decided not to fight the dragon by pressing escape (but this didn't show the constant pop-up to attack dragon).
