Win key replayed when focus changes from Windows to Ubuntu host

Solution 1:

Not a solution but a possible workaround. Does this happen only if you press Win+something (e.g. Win+Tab) or also if Win alone?

If it's e.g. Win+Tab, you can do it two ways:

  1. press Win, press Tab, release Tab, release Win
  2. press Win, press Tab, release Win, release Tab

I noticed similar artifacts in various remote desktop applications if I use the first way. However, if I release the modifier (Win or Alt) first and the effect (in above example, Tab) second then there are no artifacts.

Hope this helps.