shortcut for balken trennen

I am trying to create a shortcut for balen trennen.

But I cannot do an entry on the right side of the field. Tastaturbefehlk eingeben rests disabled.

Anyone a solution? Thanx

After restarting the application twice it works…whyever

Dorico takes a couple of seconds to realise that you’re not going to type any more keys (given you’re allowed to use sequences of keys if you wish):