I'm thinking of when you have too much knowledge about how something works to see it the way someone who had never seen it or something like it before would see it.
I know I've read about this before but can't think where. The phrase that popped into my head was "expert's dilemma" but Googling that it looks like it refers to something else, and I think I'm getting confused with "innovator's dilemma". It's possibly related to learnability vs discoverability or the difference between expert and novice.