Named boundary offset incorrectly

Hi All,

I am having some trouble with a named boundary being offset slighty when using the civil plan feature of the named boundary tool to produce sheet models.

As you can see. The clipped boundary gets offset slightly.
This only seems to happen when using the alignment in the attached file.
Previously this geomtry had a station equation attached. However, I have set to zero and the issue still remains.
When creating a new alignment or using a new piece of geomtery, it works fine.

1488.Geometry.dgn

Has anyone experienced similar? If so, what was the solution?

Thanks

Liam