Go to Settings and select Apps, then Manage apps
Search for the Swoo app and select it
Scroll down to Battery Saver and select No restrictions
Go back, open Manage apps again, and select Background autostart
Turn on the toggle for the Swoo app if it isn't already
Open the Security app and select the Boost Speed option
Tap the ⚙️ settings icon in the top right corner
Select Lock Apps and turn on the toggle for the Swoo app. This will make sure Swoo keeps running in the background without being "killed" by the system