Recently Android devices have been configured to very aggressively prioritize battery life over the functionality of background applications. To ensure the Intulse app is not affected by these settings please follow the steps below:
Note: Apps or services unable to be optimized appear grayed out.
Note: If not available, navigate: Battery Usage (next to Estimated battery life) > or the Menu icon Menu icon > Optimize battery usage.
Note: Switch color may vary.
Note: Apps or services unable to be optimized appear grayed out.
Note: Installing new samsung updates may require you to change these settings again.
Make sure to set unused apps to sleep and Auto-disable unused apps is disabled. Otherwise, Samsung will put your apps back to sleep after a few days (3 by default) even if you have woken them up manually!