To me, it looks like questions about things like "most interesting bug" are unintentionally going to be biased towards more junior developers. Once you have a lot of experience under your belt, bugs and fixes sort of all look the same. They're no longer novel. I don't know how I'm supposed to wade through 20 years of experience and recall "the most interesting bug I ever fixed". Now, if I had 2-5 years of experience, that would likely be super easy to recall.