I have the same exact issue, have you hat your cats replaced recently? Mine didn’t start doing it til I had both of them replaced and I can’t figure out whyI have the exact same issue. when i am at the light and I let off the brakes, it vibrates like hell. It feels like its form the back. Muffler area.. but as soon as a hit the gas it goes away, or even just tap the gas like 1cm and its gone.. Its also not there when the brakes are held down.
I notice it more on a hill. Esp when the cars hot.