Can't bind hotkey with `ctrl + shift_left + k`

What I’m trying to do

Bind insert code block hotkey to ctrl + shift_left + k
In hotkey menu, when I press ctrl + shift_left + k when “press hotkey…” is toggled, nothing happens
It works with ctrl + shift_right + k
It works with ctrl + shift_left + m (or any other character)

Things I have tried

Thanks by advance!