splines - when trimmed they move

Hello everyone,

the following version:
Win10 pro
DS professional 2023 SP1x64 and before DS Professional 2023 (same issue)

We have a problem with splines as soon as they are cut or trimmed since the version 2023/SP1 2023.
We draw a long spline with multiple points. Then a line comes from somewhere else and crosses that, intersects that. It doesn't matter whether it's a spline, a line or an infinite line, circle, etc.

If we now want to trim or cut the SPLINE on the other line, then it will smash the spline and the spline is not where it was before. This is no longer in its previous form and takes on a new form.
It's been like this since this version. Previous versions never had this problem. We have been using Draftsight since 2014 and since this update or bug, the added value of Draftsight is no longer available for us.
Does anyone else have this or can someone give us a tip?

Thanks.