Bottom Speakers sometimes arent being used

Hey everyone, I was just wondering if this has happened to your devices or if its the hardware failing. On my pixel 6 every couple of weeks or so the bottom loudspeakers just arent being used meaning they dont play whatever media im consuming at the time but after a force restart it does go back to normal. What are your guys thoughts? Is this a common hardware problem or just a a software glitch?

Edit: I'm using grapheneos