MagniFi Mini - HDMI ARC - does power up when TV turned on

I have a MagniFi Mini connected to a Panasonic Viera TV via HDMI ARC

Everything is working except for the sound bar turning back on when I turn the TV on.
When I turn the TV off, the sound bar turns off. However when I turn the TV on, I have to then turn the sound bar on as well.

Is there a way to make this work?

Answers