Long story short: I know you can disable HR switching, but so far (before 12.x release) I was able after finishing the run to Download HR data. The watch would connect to my HRM 600 and download successfully the external HR so my real heart rate would be 140 instead of 200 (cadence lock of the OHR - which in itself is ridiculous since every now and then the watch would connect to the HRM change the HR from 170 to 136 and once disconnect again increase it to these ridiculous numbers).
After 12.x release every time I try to download HR data the watch would do: Searching for external data and after a while say no external HR sensor found even though it is connected to the HRM600.
So basically I am stuck with the cadence HR data (tanking my VO and readiness, etc.).
Am I the only one? Thanks a bunch.