It looks like DXF import was fixed in Illustrator 25.0.1. But the latest and the newer version after this 25.0.1, the dxf import is having issues again. Please fix it.
Also I noticed that the file format options when trying to import in the DXF, in the AI 24 version it was labeled as Autocad interchange file (.DXF) and the new version 25 is labeled as Autodesk RealDWG (.dxf).
I dont know what the previous issue was, but I'm thinking the dxf file is trying to read it the dxf file as DWG file type?
It looks like DXF import was fixed in Illustrator 25.0.1. But the latest and the newer version after this 25.0.1, the dxf import is having issues again. Please fix it.
Also I noticed that the file format options when trying to import in the DXF, in the AI 24 version it was labeled as Autocad interchange file (.DXF) and the new version 25 is labeled as Autodesk RealDWG (.dxf).
I dont know what the previous issue was, but I'm thinking the dxf file is trying to read it the dxf file as DWG file type?