Action-Area Not Working

[weilbith]

Hey.
I try to use the actions for a section in the bar. But unfortunately I can't get it work.
A minimal example would be the following: echo "%{A1:notify-send 'Test'} Test %{A}" | lemonbar -p.
When I click: nothing. What am I doing wrong?

[weilbith]

Any hints? :/