As shown here the Moi Export PDF don't takes the circles as a connected curves...
Will be fine to have something who makes all surfaces visible in any view (even empty faces) as connected!
...of course in this particular image i can redraw manually 3 circles...but...
(the Moi figure has just one default color)
https://moiscript.weebly.com/uploads/3/9/3/8/3938813/gag.pdf