There definitely seem to be some undocumented changes to 17.01.
Comparing software versions with 16.07
Sensor Version: 34.13 -> 35.10
WHR Version: 20.06.02 -> 21.01.00
BMX: 20.6.2 -> 21.1.0 (now matches Secondary BMX)
NFC Version: 3.5.5 -> 3.5.8
There definitely seem to be some undocumented changes to 17.01.
Comparing software versions with 16.07
Sensor Version: 34.13 -> 35.10
WHR Version: 20.06.02 -> 21.01.00
BMX: 20.6.2 -> 21.1.0 (now matches Secondary BMX)
NFC Version: 3.5.5 -> 3.5.8