Apple had acknowledged they had an issue [https://appleinsider.com/articles/19/12/07/apple-confirms-16-inch-macbook-pro-popping-sound-is-software-issue|Apple confirms 16-inch MacBook Pro 'popping' sound is software issue].
It was expected to have been fixed in a software update. Are you running the latest OS and updates?
If you are then you’ll need to talk with Apple support to see what they say.