(1) Disable power saving mode
- Go to Phone settings -> Care. battery and device (or Device care) -> Battery
- Make sure Power Save Mode (Energy Saver) is turned off.
(2) Make an exception for Activy
- Then go to the menu “Background usage limits”
- disable the setting “Enter unused app. in tr. sleep.”
- Then go to "Never put the app to sleep"
- Using the “+” icon in the upper right corner, open the list of applications, select Activy and confirm your choice with the Add button.
(3) Disable optimization automations (optional)
- Go to Phone Settings -> Battery & Device Care (or Device Care)
- Click on the 3 dots in the upper right corner and select Automation.
- Make sure all settings on this screen are disabled.