Sound delay when using soundbar while Playing BfV

Hi,

I am having this sound lag while playing Battlefield V. I am having this issue when i use soundbar to get the Audio.

I have following configuration:

Xbox one x connected through HDMI to TV LG UJ635v which is connected by arc to Samsung sound bar HW-M450 with SWA-8500 rear speakers.

Audio Bitstream out-Dolby digital.

So, when i start the game everything runs smooth. There is still lag but is minimal and only noticed when using headphones along side. However, as i continue playing bf suddenly there is no sound in the middle of the game. The audio
returns only when I have restarted the TV and soundbar. But then this lag occurs which is irritating specially when the fired bullet is heard after few milliseconds. I don't want to have hdmi going through soundbar as it doesn't support 4K pass through. I
have already tried to reset the console. Moreover, the controller disconnects during the game for few seconds even using all the original Microsoft accessories. I had it replaced from shop once with new one but the problem is still there though, just not frequent.

Would be glad to hear solutions to these problems.

Thank you.

:)