Not sure I understand the problem from that brief explanation It certainly doesn’t sound like anything I’ve seen..
What does “the window doesn’t close exactly” mean? It partially closes ???
Is it happening on both sites, or only the A-D site?
If only one site, how do they differ?
Is it reproducible? If so, how?
What were you editing?
What were the edited entries?
Have you checked your web server logs?
Have you checked the kiwitrees site log (in admin?
At the time, did you check the developer tools / console (f12 button on most browsers) for any error messages?