Only left speaker working mac book air 2020

Hi community, I recently got a macbook air 2020 with the speakers working fine. However, I don't know what happened but one day, only the left speakers work and one day I trouble-shooted and everything went back to normal. Unfortunately the problem is back again and I am very frustrated.

I have tried restarting, shutting down, looking at the sliders on my sound preferences, the mute, resetting PRAM and SMC, but they all don't seem to work. I feel like there is something wrong with my audiomidi set-up because I can't control the channel volumes. Please help me, I find this very annoying and am questioning why Apple hasn't solved this software issue yet. Thanks!

Here's a screen shot of my audio midi settings.

Best,

Viv