In my opinion, the person who discovers a problem deals with the problem. A law enforcement officer sees someone aim a gun at another. The LEO is off duty or out of jurisdiction. Societal expectation is the LEO will intervene.
The same applies to me being an employee. If I discover a problem, then it is my responsibility to intervene as best I can. If I have no access to the systems or skill to do anything, then I should inform those who can and provide the information I know to best aid them in assessing the problem. If I do have the access, then I should work the issue as best I can. It might technically belong to someone else or another group, but if I have been given access to the systems and have the skill, then I should deal with it.
Even if I lack the access or skill, then I still feel like the issue is still MINE until it is resolved however that is. My responsibility becomes to find the person who can deal with the situation. I am not absolved just because it is not something I can do.
I thought maybe this came from my work at a university, but I am not so sure. I feel like I held this attitude even early in my work there. I would help other students anywhere I was. I did the same in high school, such as stores where as a customer I fixed misshelved books or items put in the wrong place. Anyhow it came about, I feel responsible for ensuring things are working around me.