Label Text selection

I just noticed a wrong behavior in Label Text selection:
if you select all and shift-Left-Arrow thrice (or twice or…), nothing happens.

Why that ?
Suppose you do not want to copy the last n characters…

If you want to copy the whole text excluding the last n characters, place the cursor at the left part of the text , press Shift-Command-Right_Arrow and then press as needed Shift-Left-Arrow.

This is on macOS / 2019r1.1 (and some priors). No idea for 2019r2.

In a project, I shadow what’s in a Listbox into a Label (located at the window’s bottom), with stats at the Caption beginning (left). So I start by removing these, then sometimes I use Select All (Cmd-A).