Default [Q] Cannot control Volume When playing Music

Hi there.

When playing MP3 songs, the player plays the music in full volume, regardless of the media volume the phone has, so on the phone screen I can see the volume bar changing, but the music keeps playing as if it's on full volume even when I mute it.

This happens both on Apollo and Rocket player

Lg g2 version is d802

rom: LiquidSmooth v3.0 Alpha 4.4.2

Thanks in advance!