Mirror reflects room behind it

Just wondering if anyone else is having this issue but I have a mirror in a hallway lit by a static and stationary light and for some reason, it is reflecting the room behind it rather than what is in front of it. I tried searching online to see if anyone else was having a similar issue but no matter what search phrase I used I couldn’t find someone else having the same issue. Is this a really strange unique issue I am having or a common problem that is easy to fix? I am using a sphere reflection capture a few feet away from it.