CustomTab关闭后,活动闪烁

Question

我有按钮的活动.OnClick打开CustomTab:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
                builder.build().launchUrl(MainActivity.this, Uri.parse("https://www.google.com"));
            }
        });
    }
}

关闭CustomTab后,MainActivity会以黑色闪烁.为什么会这样？我怎样才能解决这个问题？该问题例如由Nexus 5X android 8.0,Pixel 2 android 8.0重现

使用自定义动画: