Weird static noise in headset on Ubuntu 20.04

After updating to Ubuntu 20.04, there's always a very low volume static noise that keeps coming and going on my in-ear headset when my laptop is charging. The noise is not noticeable when something is playing but it's driving me crazy. I tried almost all the solutions I could find and nothing worked.

This problem is only present in Ubuntu and goes away when I boot into Windows 10. I am using Dell Inspiron 15 7547. Can anyone help?