Losing mail by moving other mail (via keyboard shortcut)

I have been trying to reproduce the issue on my system. Unfortunately, I was not able to reproduce it. Can any of you please provide the following, additional information?

  1. Go to “Developer” > “Toggle Developer Tools”
  2. Chose the “Console” tab
  3. Press “Clear Console” (Ctrl + L)
  4. Reproduce the Issue
  5. Do a right click inside the console and click “Save as”
  6. Clear any personal information from the debug file that you now have created
  7. Attach the file here.

This would greatly help me trying to figure out, where this is coming from.