Why is there a red bar / section / block in my sleep graph? - Sleep as Android

The red block indicates that something went wrong with tracking at that time and the device stopped providing sensor data for some reason. Usually those are some non-standard battery optimizations or battery savers, the battery gets too low so we preserve it for the alarm or connectivity issue if you use a wearable.

This is a companion discussion topic for the original entry at https://docs.sleep.urbandroid.org//faqs/red_sections_graph.html

I have a Polar H10 paired with the app. I get good data (HR, HRV, accelerometer) from the wearable for the first few hours of the night, but there is always a point where the tracking stops and I get the red bar for the rest of the night. I think it is happening when I get up to go to the bathroom during the night. This post seems to indicate that when I come back into bluetooth range, the app should reconnect to my wearable, but this is not happening.

Hello @jugdizh, can you please use menu - report a bug to let us know more details on what exactly has happened? Big thanks…