I have Garmin speed & cadence sensor bundle (attempted connection through bluetooth on windows PC & Android companion app - both having the same issue on both) It appears its connecting to both, and cadence sensor is transmitting data - but speed sensor is not. And on the log it looks as tho it is connecting twice to the cadence sensor and not to the speed sensor?
You don’t try and “Pair” anything first. I just opened Zwift when the sensors came up click search and select to one that is your bike. Once things go Blue and say connected for each sensor away you go. Each time I login to Zwift it just remembers all the connections I made last time. It takes a few seconds to search for them again and change from orange to blue but its all automatic. Zwift is one click for me when it first opens and it does the rest automatically while I put my shoes on. The set-up is a Windows 10 PC and the EDIMAX BT-8500 V5.0 USB Bluetooth adapter with a WattBike. I found that other Bluetooth adapters don’t work anywhere near as good, even those that claim V5.3 or V5.4 were not giving me a seamless reconnect.