From a conversation with a few people I know IRL: When people create amazing story points for their character or for the world in general only to somehow completely draw a blank when you ask them to explore that further.
“I really like how you established your character was secretly undermining the Lord of the West Rivers, can we do some more undermining plot stuff with that?”
“Wait what? I have no idea what you are talking about and am not interested in that in the least.”
“Ok. Well… ugh.”