Fixed view hiding not working properly.

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/in_app_browser/InAppBrowserActivity.java

@@ -541,8 +541,12 @@ public class InAppBrowserActivity extends AppCompatActivity implements InAppBrow
       }
       ViewGroup vg = (ViewGroup) (webView.getParent());
       if (vg != null) {
-        //Modified view removal to try and fix a crash
-        webView.visibility = View.GONE;
+        // Modified view removal to try and fix a crash
+        for (int i = 0; i < vg.getChildCount(); i++) {
+          View v = vg.getChildAt(i);
+          v.visibility = View.GONE;
+        }
+        // instead of using
 //        vg.removeView(webView);
       }
       webView.setWebChromeClient(new WebChromeClient());