Selection doesn't copy the last line
Let's say you select just one line. If you try to copy that line, it won't copy a thing.
You have to select the line under the one you want to copy the above.
Check screenshots: Just that selection won't get copied.
Sometimes it just does work, but there's no change I made for that.
GNOME 43.2, Wayland session, tried without extensions, Arch Linux