Steps to produce minimal file: - Open Inkscape - Create an ellipse/circle (not an arc/chord/etc.) - Set a stroke to something thick and set linecap to square (Fill and Stroke > Stroke Style) - Artefact may be visible (see below), definitely visible on reopen. Steps to reproduce: - Open specified Inkscape file. - Change to outline mode (Ctrl+5) - Select a circle of the template shapes. - Assign it a stroke. -- (Or select a circle with stroke) - Duplicate it (Ctrl+D) #### What happened? A little rectangle corrupts the stroke/shape in the circle close node.  #### What should have happened? Just duplicate it without any modification. #### Notes - I can solve it selecting all the duplicates affected with the `Select and transform objects` tool. Next select `Create circles, ellipses and arcs` tool and finally add a number to any of start/end entries so click on `Make the shape a whole ellipse, not arc or segment`. - This does not occurs with new ellipses (into or out the file). Just with the ellipses in the file attached. - `Stroke to path` does not solve the situation, but `Object to path` shows that the nodes are separated.  I would add that when "solving" as I mentioned above, this does not occurs. #### Inkscape Version and Operating System: - Inkscape Version: 1.0beta1 (58d3a45bae, 2019-10-02) (Snap version) - Operating System: Debian 10 Example file.