Mirror is not updated when updating variable

I have a sketched mirrored and when I update a variable the original sketch updates but not the mirror.

How can I keep the mirror in sync with the original?

I’m new here so i can’t post a screen grab.

I just tried on 26.80.0 on MacOS and it worked.

I sketched a rectangle, made one side length a variable, created a construction line next to it, and mirrored the rectangle using that line. I updated the variable and the original and mirror both change. In case you were mirroring an extrusion, I extruded the rectangle and mirrored the extrusion using that same construction line, updated the variable and both the original and mirror changed.

You’ll need to provide a more detailed description or better yet the project and/or video to show the issue.