Soundbar 700 update firmware 9.0

Just last night my soundbar 700 got updated it took overnight not sure what exactly got updated, as only app was showing as installing updated but there was no indication from the soundbar.

However after this update I could observe the difference in the intensity of the volume as it has increased, also when I switch off my soundbar and agin put it on the volume bar automay starts from the highest level.

earlier this was not an issue can anyone help me out on the same and can we have the exact specifications as what exactly the update did or what fix. It's really strange that the update starts automatically ideally it should give us a notification