Hi, I have configured my QC 35's to standby automatically after 5 minutes.
This works if I disconnect from all sources or if I connect to my IPhone only.
If I connect to my Windows laptop it wont work with both Stereo and Hands Free AG.
I have made sure my firmware is up to date with the most recent IOS Bose Connect App.
I have made sure no audio was being transmitted over this 5 minute interval, still the headphones do not go to standby mode.
Update: I fixed this solution by updating my windows bluetooth drivers, if anyone is still looking for a solution to this problem!