Got a new roku hisense TV R43B7120UK about 10 days ago. Today I've noticed the volume is suddenly quite low, having not changed any settings. Audio seems low in some apps (iplayer, plex), having to crank up over 50 to make it audible. On Spotify, volume levels seem normal.
Powered off and on, and volume returned to normal, but a little while later was low on the same apps again. Obviously constantly powering on and off is not a solution. Any ideas?