Not sure if ive missed an option for this or not seen a similar issue here but
But when a user moves the cursor to the beginning of a line of text then press Ctrl Shift END to select all the text in that line and press control C after that the copied text does not end up in the clipboard.
*Edit*
Pressing shift and down to highlight the text and copy does not copy the text either.
Pressing HOME on the line then ctrl shift END does not copy
All of these no copies will work if you move the cursor in one character then press ctrl shift end does work, seems to only happen with the cursor at the very beginning of a line of text