Thanks, I've done some research and yes it seems to be normal .
I was pretty disappointed since i bought this for playing movies and games , i wasn't aware of this issue :/
I can adjust the audio offset with my main player Diceplayer but it's just not convenient because that delay seems to varie, even on a same movie .
I tried a few video players and i couldn't believe, i have no issue with MX player, i can even skip forward or back, no lag, synced like it's wired lol
Dunno why it works, tried with mp4. avi, 1080 mkv so i'll just use Mx player when using my bluetooth speaker
Streaming over lan makes the videos lag a lot though..
Netflix , games are out of sync except a few ones