On the home screen of the LG device, app shortcuts and widgets can be moved around by simply tapping and holding, but this happens unintentionally from time to time. Once you have set up your home screen, you can lock it in the preferences, which means that you can't edit/change the home screen as long as the option is enabled.

Android 9 | LG UX 9.0
Lock Home screen layout -  Tap and hold a free area on the  home screen
Lock Home screen layout -  Tap on  Home screen settings
Lock Home screen layout -  Enable or Disable  Home screen lock
  1. Tap and hold a free area on the home screen
  2. Tap on Home screen settings
  3. Enable or Disable Home screen lock

LG Instructions
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