I am using MEIZU phone

Step 1: Open Security app

Step 2: Click on Power 

Step 3: Click on Settings icon

Step 4: Make sure "No linked launch when standby"

Step 5: Now go back and click on "Standby management"

Step 6: Make sure the toggle parallel to Skooly app is enabled

Step 7: Now go back to Security app home page and click on Permission

Step 8: Click on Auto-launched Apps

Step 9: Make sure the toggle parallel to Skooly app is enabled