I’m opposite about the feeling.
When I work on a problem that’s new to me, I ask around, explaining the problem, checking if someone recognizes the domain, if it is known.
When someone explains to me what I’m working on is a solved problem, I take great joy from it since I already understand the issue some, I can criticize or take great energy from learning something for sure.
I believe how to feel about it is a choice btw. As movie says “Always Look on the Bright Side of Life”.