While I'm playing pubg total game sounds are breaking for 2 sec but the game has no lag it's running smoothly.
(Both Outdoor mode and indoor mood)
Specially vehicle sounds
Thanks for reporting.
We won't be able to verify on PUBG Mobile as its banned in India.
Can you test on other game and report back.
Also, make sure your phone is on latest firmware which is Version WW-17.0240.2009.47