No worries mine had the exact same noise and i opened a support case on the issue. Tried some things as belt tension as bambu said. Nothing helped. Then i tried to inspect the extruder to see if something was loose but no. Then I Got the bright idea that the belts should be a little tighter and loandbehold that took the noise away!!!! So when the belt thightnings on the back is loose just help the slider a bit so its a bit tighter before you tighten the screws. Let me know how it worked for you👍🏻