Posted by LordOfBikes on Mar 10, 2019; 10:23pm
URL: https://forum.librecad.org/DXF-File-Import-Issues-tp5717034p5717061.html

This last effect, where lines are misplaced to the origin looks like this issue: https://github.com/LibreCAD/LibreCAD/issues/940
It was caused by splines and solved in Sep. 2018. If this applies to your file, you can try the nightly build version which is available for Windows but sadly not for Mac.
It is 2.2.0 release candidate and as stable as 2.1.3, if not more.

Concerning the removed objects, there is no more information available.
From source I could see, that on file open all entities are scanned for valid extent values.
If one contains invalid data, it is removed from the document, but not more.
Hard to say, where these invalid data come from, without having the file.
They could be caused by the import library or unsupported entities.

Generally I have no experience with binary DXF, I don't have access to AutoCAD and I'm not sure if I ever saw a binary DXF.
I also don't know about issues with ASCII DXF, I would need to look into the file that hung to say more about this.

Armin