Containers lose their selections

After importing vsd file, every shape inside container loses all of its relationships.

vsd file in question and screenshot of an isse:
container issue.zip (422.1 KB)

The example shows only one shape, but the same thing happens to every other shape inside lanes.

The file was converted using this part of code:

File file = new File(PATH_TO_VSD_FILE);
Diagram d = new Diagram(file.getAbsolutePath());
d.save(file.getAbsolutePath() + "x", SaveFileFormat.VSDX);

@Denec
Thanks for the template file and screenshots.
After an initial testing, I am able to reproduce the issue as you mentioned by using your template file. I found the selection of the shape in the right-click menu bar is not working.
We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): DIAGRAMNET-53378

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

Thank you for your reply.

I’ve found similar issue with another diagram. Vsd file with a screenshot:
containers losing selection.zip (225.7 KB)

@Denec
Thanks for the new template file and screenshots.
However, unfortunately, we cannot find the same issue as mentioned above. We cannot locate the problem with the missing right-click menu in the original vsd file. Could you please indicate which shape or if there is another issue with the shape? Could you please circle it in screenshots.
Thanks.