You will probably find the object is mirrored.
There is a bug that will not print elipses in objects in PDFs if the object is mirrored.
It has been fixed in version 15.
Barry.
One of the forum moderators. Versions 6.5 to 27 i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11
You can also try to use a different pdf printer. I've had different results with those. I usually use DoPDF (which is free) and Foxit.
I hope this helps.