Garmin Add-on for Sleep app

While I didn't experience the battery drainage, I had others. I have a Venu 3. Many times the watch app doesn't close when I stopped on the Phone. This is forcing me to turn off the watch and turned on back and many when I check in Sleep as Android, the heart rate and other metrics from the watch has suddenly halted in the middle of the night. BTW they can improved the app by give it an option button and turn off the screen after a while.

It feels so unpolished, like a beta version even though it was released in 2017! My watch used up 30% battery compared to 10% without it, which is at least bad! My Android Wear watch was using much less battery! And the worst is that the data is all wrong! There is a recurring pattern of no sleep data (red) and in-between light sleep; for sure not valid data. I will disable the add-on until at least the data issue is fixed. The developer can certainly ask for any information I can provide.

The app provides inconsistent data sync during sleep tracking. Sometimes it records full HR, HRV and SpO2 during the entire sleep, sometimes it records the first half or less and then stops recording data from the watch. The last couple of nights it recorded literally nothing. I've already disabled battery optimisation, disabled pause app when not used etc, but things didn't change. Update: I checked all system settings and ensured that app has no restrictions or battery optimization. No change.