On user's share window I select (highlight) text of a magnet link with intention to copy it. Right click menu displays two copy options: 1. Copy Selected Text and 2. Copy Link. When 1. is used the result depends on what portion of text is selected. If only some text is selected, the text is copied. If all text is selected, magnet link is copied instead. With 2. option used, magnet link is copied always.

Copy Selected Text should copy text only.

Uhm, I don't really see the problem here. All text is the link. If you mean the url-type part like http or magnet, well, it's better to have it for later. If you mean the title, it's randomly set by the creator. People don't want to care (or be noted) as this could be just a number, you are supposed to set the folder name right by yourself.