To make sure the app doesn't get killed while in the background,

1. Go to Settings; Battery; App Launch; Racemate.

2. By default it will be set to be managed automatically, change it to manually, choose to open " Run in background" and click ok.

3. Now, reboot the device and check it out.
For more details, please watch the following video:

To make sure the app doesn't get killed while in the background,

1. Go to Settings; Additional settings; Battery; Manage app battery usage, now disable / turn off the following options.

2. Manage battery usage of apps; Restrict apps when battery is low

3. Now, reboot the device and check it out.
For more details, please watch the following video:

1. Try going into Settings > Apps & Notifications > Advanced > Special app access > Battery optimization.



2. Under Battery Optimization, change Racemate app's preferences to be 'Not optimized'



3. Also, try to lock Racemate by switching the app down or holding it and clicking the lock icon in the recent apps screen.

To make sure the app doesn't get killed while in the background,

1. Go to Settings; Battery; Battery usage by app; Racemate.

2. Enable "Allow background activity"

3. Enable " Allow auto launch"

For more details, please watch the following video: