I have this exact issue with my 2014 xdrive35i with 136,000 miles. I actually made a previous post of my own about it.
https://www.bimmerpost.com/forums/sh...php?p=27547268
Would love to know what it is since I haven't been able to get any answers.
Wanted to add a more recent clip that I have taken.
https://youtube.com/shorts/zE2gu_IPUoQ?feature=share