The beast does buzz, muting that buzz is just part of playing bass. All kind of ways to take care of the problem, depending on how you play, fingers, thumb or pick.
I'm a thumb guy and use a palm mute. That and a set up by your music store will help. I also have a piece of foam rubber
under the strings at the bridge. That and the palm mute seems to do the trick. The foam rubber gives an upright double bass sound that I like.
Another reason for an instructor. Knee to knee he/she would have eliminated that problem in short order.
Foam Rubber Mutes.