Describe the bug

Saving & loading a model loses the original position of some connector ends.

To Reproduce

Steps to reproduce the behavior:

1. Create a diagram with four classes (say A, B1, B2, B3)
2. Create three composite associations between A and each Bn.
3. Save the model.
4. Restart Gaphor and open the model.
5. One end of a composite association has moved.

Nothing reported in the error report.

Expected behavior

After reloading the model, the diagram looks the same as it looked when saved.

Screenshots

Diagram view when saving the model:

Diagram view after reloading the model:

OS

• Linux (Debian GNU/Linux 12.2 "bookworms")
• macOS
• Windows

Version

Version of Gaphor: 2.21.0

Additional information

Model: