It would be more helpful if everyone included more details such as trainer type, computer type, phone type, ANT+ or Bluetooth, etc…
For those one Android, remember it is beta and you should probably look here and post here: Zwift Android Beta
For those using Bluetooth on Windows, that too is beta. I do not use Windows and do not know the current progress of the beta, but per note warnings in the initial release note:
@Nicholas_Schneider_w Make sure you are force quitting the Zwift app after each riding session. Also make sure you are force quitting the Zwift Companion app after each riding session. This will eliminate many problems w/Zwift on the Apple TV and/or iOS devices.