Yeah, same experience here too. I "vibe coded" a project, about 3k loc including tests. But whenever I need to look at it for bugs etc it just feels like I'm looking at someone else's code. I don't have that intuition of where things are, which bits are a bit fragile, which bits might be the likely cause of an issue etc.

I mean, ultimately, I didn't write it myself. It's more of a "remix" of other people's code. Or like if I translated this comment into French. It wouldn't improve my French so why would vibe coding be expected to improve one's programming ability?