Yes it was from a pdf import :/

Hi Matadem, there isn't any method in PDF files to have exact circles. It only has either lines or general Bezier curves.

So something that looks like a circle in a PDF is not precisely an actual circle, it's just a generic spline curve that is shaped similar to a circle.

The one in your case here deviates from an exact circle by around 0.003 units. It's a little too much deviation for MoI to consider it a circle.

- Michael

Hi Matadem, if the app that generated the PDF file is able to have true circles in it, then you might try using SVG or DXF format if possible, rather than PDF.

Both SVG and DXF have a way to store precise circles in them which PDF does not.

- Michael

But even for this object, selecting - Bounding box center makes it work.