IssueTracker

Component used: Fragment

Version used: 1.3.0-beta01

Devices/Android versions reproduced on: Pixel 2 API 29 emulator

Muzei's main module uses TRANSIT_FADE to swap between fragments based on whether Muzei is your current wallpaper. This listener is set on a Flow that runs when the fragment is at least STARTED, meaning that callbacks end up normally being triggered as part of the move to STARTED.

Reproduction steps:

1. Download https://github.com/romannurik/muzei
2. Comment out FragmentManager.enableNewStateManager(false) in MuzeiApplication in the main module
3. Run the app
4. Hit 'Activate' button
5. Set Muzei as your wallpaper

Expected behavior: Next screen (TutorialFragment) appears

Actual behavior: New fragment does not appear, despite going to RESUMED state

Additional information: If I attach the layout inspector, the fragment magically appears!

Removing the TRANSIT_FADE or using the old state manager causes everything to work as expected as well.