My LG TV is connected to my soundbar with bluetooth. Problem is, when I raise TV volume, the bar rises to the top, but the volume in soundbar stays around 20%. I have checked it with other devices like mobile, where the soundbar reaches maximum volume (means soundbar works fine). If I use Optical cable, then there is considerable lag between audio and video (bad lip synching), hence bluetooth is the only option.

Any ideas? Thanks in advance