2.82: I was doing some modeling w/the Mirror Modifier, and it just wasn’t working. So I changed to a different scene in the same .blend file, and when I switched back to the mirror’d scene, lo and behold Mirror M. was working again.
So, I’m wondering: are there cases where the Mirro M. just needs to be reset by changing Scenes? and mostly: have other users seen this behavior?
(Obviously, this would be a bug.)