I think it’s just a feature of the car, ours (G21 xdrive 320d) did this when we first got it, it appears to have gone now or not as noticeable. Ours only had 1.2k miles on it when we got it so may be part of a bedding in scenario
I’m happy to be enlightened if there is a common fault tho, but I’m thinking that’s not the case.