Android icon while switching apps

What type of icon does Expo specify when the app is in Overview/Multitasking/Fast app switching mode?

While my app is showing the splash screen, it uses the adaptive icon. But after the splash screen, it uses the regular icon (see image below, icon in question is circled in red).

The regular icon is 1024x1024 in size.

Is this normal?

My app.json:

    "android": {
      "adaptiveIcon": {
        "foregroundImage": "./assets/images/Android-Icon-Foreground.png",
        "backgroundImage": "./assets/images/Android-Icon-Background.png"
      }
    }