inkscape colors

[A]

I don't know if all of the following steps are required to duplicate the bug, but it's what I do.

I created a rectangle object. Gave it a flat color. Then I duplicated it... at least several times. I dragged them to a new position and changed the color. Dragged it again. Changed flat to gradient and/or radial. Dragged it again.

At some point among all this duplication, dragging and coloring, the colors do weird things, mostly losing the color rendering the object invisible; sometimes it just changes to a random color or black. If I click on it and change the radial to gradient and back again, all is well as long as I don't move the object. If I change it to flat I get random other colors.

Note, I'm using both the area inside the boundary lines of wht I guess is the drawing area?, as well as outside. Not sure if I'm supposed to be on the outside but I am.

Description: Ubuntu 16.04.6 LTS
Release: 16.04

inkscape:
  Installed: 0.91-7ubuntu2
  Candidate: 0.91-7ubuntu2
  Version table:
 *** 0.91-7ubuntu2 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

[Mattia Rizzolo (mapreri)]

Hi,

do you have any chance of trying to reproduce it on a newer inkscape? Either a system running ubuntu 19.04 disco, or taking the package from https://launchpad.net/~inkscape.dev/+archive/ubuntu/stable would do.

After that, if it's still reproducible it would be great if you could also test with the alpha release 1.0, but that definitely requires a newer system than xenial, and it's a development version, so please don't use it in production.