I have the issue that whenever I have a multi-module project, all Jetpack Compose UI previews except for the ones in the app module display an additional TopAppBar with the text androidx.compose.ui.tooling.PreviewActivity when being executed on a device. You can see the result here:

When only looking at a preview without executing it, the TopAppBar does not show.
The issue appears in the simplest multi-module project, where both modules only contain a single preview composable, too. This leads me to believe it’s not caused by a complex setup. I already tried removing and adding various things in the build.gradle file and the manifest but nothing seems to help.

App module:

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            ComposePreviewWithAdMobTheme {

            }
        }
    }
}

@Preview
@Composable
fun Preview() {
    Text("Preview!")
}

Core module:

@Preview
@Composable
fun CorePreview() {
    Text("CorePreview!")
}

As mentioned before, the app module preview works fine whilst the other shows the additional TopAppBar.
Has anybody faced similar difficulties and can help me?

Thank you.