Screen Flicker on Returning Home
Several bugs in Android's gesture navigation system cause flickering issues. One of these bugs causes the preinstalled launcher to show up for a brief moment when swiping up to return home. We and other third-party launcher developers have reported these bugs to the Android dev team:
- Gesture Navigation translucent activities cause flicker with 3rd party launchers
- Home gesture shows "Recent apps" when going to home screen
Restart your phone or force-stop the preinstalled launcher (restarting Niagara Launcher is no use).