I see this concept often cited when mathematicians talk about how they had a breakthrough on a proof, but I have to say, I don't think I've ever noticed it in myself, sadly.

I have good ideas, and sometimes I need a break before my idea generation is back to a good state. Perhaps this is because I spend most of my time coding on complicated but not groundbreaking stuff.

But a little bit of jealousy certainly at seeing this described as a "universal human experience."