Hi Ian,Generally if you are using 2 sensors and having problems then the best fix is to connect the heart rate sensor via watchOS instead of via the app. This is because watchOS only allows a maximum of 2 Bluetooth connections across all third party apps, so by connecting via watchOS you will avoid any situations where it is exceeding the limit of 2 sensors.
This is compounded by the fact that watchOS sometimes seems to take a long time to disconnect from sensors, so if you tested it out before the race and then ended that test and then started another workout then watchOS can complain that the limit is exceeded because it hasn't fully disconnected after the previous workout.
Make sure to unpair the heart sensor from WorkOutDoors as well as pairing via watchOS. The app will not be aware that heart rates are coming from the sensor instead of the watch, but if the sensor is paired with the watch then that is what will happen.
Hopefully Apple will increase the sensor connection limit in the future, and make it faster to disconnect.
my issue was not so much in trying to connect more than 2 sensors - I only connect the Polar H10 HRM and the Stryd food pod. I also did not try to start WOD and get a sync before the start. I opened the WOD Running screen slightly early, maybe 3-4 min before the start, and kept it on the 'sensor traffic light' screen until I passed the starting line. I then pressed the START button but immediately noticed my sensors were not connected (two dashes instead of numbers on my main running screen in the Power, Speed and HR fields).
So it *had* a sensor lock but then WatchOS most likely took that lock away as there was too much time between landing on the sensor traffic light screen and pressing the START button on that screen?
So to others here: that is my question to you: does anyone has a failsafe approach to always start WOD properly on the starting line with the 1-2 sensors needed properly locked?