TP-Link Kasa HS300 Master Switch

Hi,
I just connected up an HS300 6 Outlet Power Switch.

I have six outlet devices and one master device in Home Assistant.
When I toggle the Master it toggles only Plug 1.

Anybody have any ideas on making it set all 6 plugs if toggling the Master Device?
I cant see anything in Kasa app or the HA device/entity