Update on this one... I took it to the dealership, reproduced the problem with them so it's not just me hearing it
They attempted to fix it, but ran into a problem where they put too much insulation in that it slowed down the open/close of the mirror movement itself. They ordered the part which came in quick, replaced it and problem is solved.
Awesome experience with BMW Fremont Service department on this one.
Hopefully this was a one-off fluke. The tech suspected since the mileage was low when the issue was reported that it was likely a bad install/part during the build process vs something that developed over the limited time it's been driven.