CTRL+C of diagram does not contain background color

[rmkk]

Dear friends, I decided to discuss what seems to be a bug ;-) However I maybe miss some setting somewhere inside. What's the problem

• My visual style is set to Microsoft office 2016 / Dark gray
• So my diagrams has a light background color
• Some diagrams are easy to read in dark, so on Diagram level, in Preperties / Theme I changed the Theme to Dark
• However, when I make a copy of this diagram using CTRL+C and CTRL+V to email for example, the diagram has dark colors but the background is light This seems to me a bug

Am I doing something wrong ?

Sorry it is not easy to insert screenshots here, it would be easy to show it on snapshots :-(

Thanks.

[rmkk]

moved to issues/bugs