If an app has hung up, it can be forced to quit via the app settings, but data may be lost.

Android 9 | LG UX 9.0
Force Close an App -  Open the  Settings
Force Close an App -  Tap on  General
Force Close an App -  Tap on  Apps & notifications
Force Close an App -  Tap on  App info
Force Close an App -  Tap on desired  App
Force Close an App -  Tap on  Force stop
Force Close an App -  Confirm with  OK
  1. Open the Settings
  2. Tap on General
  3. Tap on Apps & notifications
  4. Tap on App info
  5. Tap on desired App
  6. Tap on Force stop
  7. Confirm with OK

LG Instructions
Loading...

Transmitting...