I'm using the Windows version.
When in preview mode, and a copy is made, Joplin retains ownership of the clipboard. This allows a clipboard manager (AceText) to copy the clip into clipboard history. However, in the Markdown editor, ownership is NOT retained and, as a result, Acetext will not copy.
The reason AceText has an option for this, is because Bitwarden does not retain ownership as a security feature, and it also should not be copied. Retaining ownership is standard policy.
Since I am very seldom in the preview, I'd like the editor to work normally, like the preview does. The standard behavior is to retain ownership, like the preview mode does.
I'm guessing this is a feature, not a bug. The idea being that it provides some small security for people who encrypt their notes. However, if so, I'd like a feature to have an option in the Encryption settings to retain ownership in both preview and md editor modes. Of course, if it is a bug, it would be nice to fix it.