from time i write before problem return for me manytimes (several times a week, sometime several times a day), not find what is trigger, also not always help delete cache of QuickLauncher, but always help ForceStop QuickLauncher with or wihtout delete his cache…
last time i try:
- Delete All Data of QuickLauncher, and run it
- in Settings disable: ShowGoogleApp, AllowHomeScreenRotation
- hold GoogleSearchBar and in Preferences disable All
- switch back to Nova Launcher
Not sure what steps help, but from this (about 1 week) problem is gone 