Size problem (only for elipse) when moving a file from sketchup to Lightburn

LightBurn Software Questions
1

I already made a bunch of transfers from Sketchup to Lightburn (by converting the files in DXF), it went always very well (text, circle, square even curves…), but lastly I tried to move an object with an ellipse and this is the first time the size is modified when it comes to Lightburn.
I tried to do again and again my objects in sketchup, with a new file, using an old file, using different method to get the shape etc… but Lightburn continue to change this object.
It is adding 1 centimeter only 1 one dimension (width, not length).
Basically it is an ellipse of 5cm (width) by 7cm in sketchup, I only “use” half of this ellipse in my object (meaning 2,5 cm width and 7 cm length), when it is displayed in Light burn, the size is now 3,5 cm by 7 cm.

Any idea?

Thanks for your help

2

Test ellipse lightburn.dxf (1,2 Ko)
here is the dxf file

3

I loaded it and came up with 70mm wide by 55mm high. Overall lenght of the shape is 456.6mm.

image
image1696×1048 132 KB

4

Thanks Tim, so it seems to be the add-on to turn my sketchup into DXF which is having trouble. I will investigate!