Posted by aman on Jan 29, 2024; 12:56pm
URL: https://forum.librecad.org/Extra-lines-on-DXF-drawing-tp5724153p5724154.html

From the Faq: The DXF import process failed, why?

LibreCAD does not support all features of Autodesk DXF format. Currently, only the following DXF formats are supported: R12, R14, 2000, 2004 and 2007.

So the support to dxf is quite minimal,  I would not use it in LibreCAD.