two objects without outline are shown as different

hello,

when I open an object without outline (just 1 object, a line as a fill without any outline) from an AI file and open another CorelDraw document with a similar object and choose both, then CorelDraw says in the status bar that the outlines are different/multiple. But there is not outline in both cases :) and when I choose them one by one, it's correctly shown as such in the status bar.

I don't really care about this but wonder whether this could be just the sign of a real problem when continue working with those?

thank you

(the file has no color profiles embedded because it is too large to upload then, but the issue is also there when profiles embedded)

new.zip