URL in site-panel does not update after moving a site

Steps to reproduce:

1. Open a site A which has a child site B
2. Remember/Note the site's URL shown in the site panel
3. Right click site A in the sitemap on the left
4. Choose "Ausschneiden"/"Cut"
5. Right click a different site C that's not site A or B
6. Choose "Einfügen"/"Paste"
7. Check the site's URL in the site panel and see that it didn't change
8. Close the site panel and reopen it
9. See that the site's URL in the site panel still didn't change
10. Click "Speichern"/"Save" to save the site once
11. See that the site's URL in the site panel still didn't change
12. Close the site panel and reopen it
13. See that the site's URL in the site panel now changed

(I think the URL of the child site B updates just by re-opening the panel without having to save the site. This has to be tested/proven/validated. Maybe it has got to do with the panel that is currently open when moving the site.)

Expected behaviour: The sites' URLs should updated immediately after moving the site. Re-opening or even worse saving the site should not be necessary.