AlpineB465= Same thing. All post SU8.
-Start music is not a stutter, rather a decrease in volume (to my set level of 50) about 1-2 seconds after music starts, then once again a quick up/down as the " New Scenery" screen shows up,
(However, I “think maybe” it always did the initial volume drop?) If you don’t have volume set lower than 100 or set to 0, you will not notice the “blip” 
I’m going out on a limb here, but suspect these things are related.
And probably involve the save mechanism, either in game or cloud.
-Start up music volume change.
-Loss of persistent setting for Extremity Dead Zone & Reactivity. Zendesk# 151478
-Loss of persistent setting for Comms Device setting. Zendesk# 151429