Flaky emulator state? No compose hierarchies found in the app

[ospfranco]

I'm trying to run android tests and sometimes the emulator is in some sort of weird state? The tests just fail to start and all I get is:

[EmulatorConsole]: Failed to start Emulator console for 5554
> Task :app:connectedDebugAndroidTest
Starting 2 tests on emulator-5554 - 10

emulator-5554 - 10 Tests 0/2 completed. (0 skipped) (0 failed)

> Task :app:connectedDebugAndroidTest

com.opacitylabs.opacitycoreexample.UITests > testSuccessFlowButton[emulator-5554 - 10] FAILED 
	java.lang.IllegalStateException: No compose hierarchies found in the app. Possible reasons include: (1) the Activity that calls setContent did not launch; (2) setContent was not called; (3) setContent was called before the ComposeTestRule ran. If setContent is called by the Activity, make sure the Activity is launched after the ComposeTestRule runs
	at androidx.compose.ui.test.TestContext.getAllSemanticsNodes$ui_test_release(TestOwner.kt:87)

emulator-5554 - 10 Tests 1/2 completed. (0 skipped) (1 failed)
Finished 2 tests on emulator-5554 - 10

> Task :app:connectedDebugAndroidTest
Tests on emulator-5554 - 10 failed: There was 1 failure(s).

> Task :app:connectedDebugAndroidTest FAILED
gradle/actions: Writing build results to /home/runner/work/_temp/.gradle-actions/build-results/__reactivecircus_android-emulator-runner_2-1756305651126.json

I've tried debugging it in every way possible adding more adb shell commands to make sure the screen is not locked but to no successs, sometimes the tests pass, sometimes they fail. The code I use to run the tests:

      - name: AVD cache
        uses: actions/cache@v4
        id: avd-cache
        with:
          path: |
            ~/.android/avd/*
            ~/.android/adb*
          key: avd-29

      - name: create AVD and generate snapshot for caching
        if: steps.avd-cache.outputs.cache-hit != 'true'
        uses: reactivecircus/android-emulator-runner@v2
        with:
          api-level: 29
          arch: x86_64
          force-avd-creation: false
          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
          disable-animations: false
          script: echo "Generated AVD snapshot for caching."

      - name: run tests
        uses: reactivecircus/android-emulator-runner@v2
        with:
          api-level: 29
          arch: x86_64
          force-avd-creation: false
          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
          disable-animations: true
          script: |
            adb wait-for-device
            adb shell wm dismiss-keyguard
            adb shell input keyevent 82
            cd opacity-android && ./gradlew connectedAndroidTest

[ospfranco]

After some local debugging this can be caused by a slow emulator. After adding a lot of thread.sleeps and awaiting for elements to show in my tests there has been a reduction of the flakiness