I'm one of those folks who ends up erring on the "deeper than needed" dives when there's some question or prod-bug, and I'd like to emphasize that writing up what you found is crucial getting the most benefit from the little detours.
At a minimum, that means in such a way that when I think "Oh, I saw this before" I can find it, but ideally it's in such a way that someone else getting the same log-messages or whatever can find it too, and even better if it's a ticket in the backlog.
Obviously not ever deep-dive will be productive in the end, but it's hard to know which-is-which until you've finished the diagnosis... and maybe another few months have passed too.
At a minimum, that means in such a way that when I think "Oh, I saw this before" I can find it, but ideally it's in such a way that someone else getting the same log-messages or whatever can find it too, and even better if it's a ticket in the backlog.
Obviously not ever deep-dive will be productive in the end, but it's hard to know which-is-which until you've finished the diagnosis... and maybe another few months have passed too.