Split with Lines does not appear to be working for me in QGIS 3.24.

[![enter image description here][1]][1]

My line and polygon are in the same CRS, you can see that they completely intersect but when I get the results, the polygon is unsplit (the layer has a single polygon).

Why is that?

  [1]: https://i.sstatic.net/Xz6O0.png