HT-SF150 soundbar Audio is Flat and Quiet once turned off

[Callum185]

I have an issue with the HT-SF150 soundbar. If I turn it off at the plug and turn it on again, the audio is perfect and crisp. But if I turn the sound bar off and back on with the remote the audio is quiet and flat. Any reason for this?  

[TheGOAT]

@Callum185 Are you connecting it via HDMI or Bluetooth? Also, are you connecting it to a TV or other devices?

[Callum185]

Connected via HDMI and connected to the Sony Bravia TV 

[MaggieGreene]

@Callum185 Does this issue happen with other devices as well other than the TV? What is the model of your TV? 

[Callum185]

The issue happens while using every aspect of the TV, Sky, Amazon Firestick and the inbuilt apps such as Youtube. The TV is the Sony Bravia KD55X75WL.