Apps suddenly stopped starting automatically when my phone boots I have two apps that I expect to start when I boot my phone: AccuBattery and Weatherbug. A few months ago though, Weatherbug stopped starting automatically, and AccuBattery stopped a couple days ago. I've been needing to remember to manually start them when I boot my phone, which is a pain. 

Neither app lists such a change in functionality in their changelogs, and I haven't done a firmware update that would change how Android functions. 

Does anyone know why these apps stopped starting automatically?

Note 8, Android 9
It turns out Android decided to "optimize" the apps for some reason, which apparently had the effect of preventing them from starting automatically.

To fix this,


Go into Settings
Search for "Optimize" (click the magnifying glass in the top right)
Click "Optimize battery usage", then click the option again in the menu that comes up
In the drop-down at the top, click "All"
Find your app(s) in the list, and deselect the toggle to the right of it.


The app(s) should now start properly when your phone starts.