Text on curve : weird behavior of origin

Hi all,

I would like to put a text on a curve using the option “Text on Curve” in the “F” panel. It works but when I want to change the origin of the text by moving it to 3D cursor, the behavior is unpredictable. Is this a bug ?

It works ok if I convert the text to mesh.

EDIT : it seems not coming from the “Text on Curve” option.