🐛 Native Ads randomly failing to load on hot restart or running the app

Bug report

Describe the bug Every time I hot restart or run my app some native ads randomly fail to load for some reason.

Errors:

I/Ads     (18470): Received log message: <Google:HTML> Incorrect native ad response. Click actions 
were not properly specified
I/Ads     (18470): Ad failed to load : 0
I/flutter (18470): NativeAd failedToLoad: LoadAdError(code: 0, domain: com.google.android.gms.ads, 
message: Internal error.)

W/ImageReader_JNI(18470): Unable to acquire a buffer item, very likely client tried to acquire more than maxImages buffers
I/flutter (18470): NativeAd failedToLoad: LoadAdError(code: 0, domain: com.google.android.gms.ads, message: Internal error.)
I/yl.app(18470): NativeAlloc concurrent copying GC freed 15902(1395KB) AllocSpace objects, 24(2152KB) LOS objects, 49% free, 5374KB/10MB, paused 1.580ms total 477.969ms
W/ImageReader_JNI(18470): Unable to acquire a buffer item, very likely client tried to acquire more than maxImages buffers

Steps to reproduce

Steps to reproduce the behavior:

1. Create a column full of some native ads
2. Run your flutter app
3. See error or incorrect behavior

Expected behavior

All native ads load properly.

Additional Context

I am using multiple native ads in a column.

Code:

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';

class NativeAdWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => NativeAdState();
}

class NativeAdState extends State<NativeAdWidget> {
  NativeAd _nativeAd;
  final Completer<NativeAd> nativeAdCompleter = Completer<NativeAd>();

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _nativeAd = NativeAd(
      adUnitId: myAdId,
      request: AdRequest(),
      factoryId: 'listTile',
      listener: AdListener(
        onAdLoaded: (Ad ad) {
          print('$NativeAd loaded.');
          nativeAdCompleter.complete(ad as NativeAd);
        },
        onAdFailedToLoad: (Ad ad, LoadAdError error) {
          print('$NativeAd failedToLoad: $error');
          _nativeAd?.dispose();
          _nativeAd = null;
          nativeAdCompleter.completeError(null);
        },
        onAdOpened: (Ad ad) => print('$NativeAd onAdOpened.'),
        onAdClosed: (Ad ad) => print('$NativeAd onAdClosed.'),
        onApplicationExit: (Ad ad) => print('$NativeAd onApplicationExit.'),
      ),
    );
    Future<void>.delayed(Duration(seconds: 1), () => _nativeAd?.load());
  }

  @override
  void dispose() {
    super.dispose();
    _nativeAd?.dispose();
    _nativeAd = null;
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<NativeAd>(
      future: nativeAdCompleter.future,
      builder: (BuildContext context, AsyncSnapshot<NativeAd> snapshot) {
        Widget child;

        switch (snapshot.connectionState) {
          case ConnectionState.none:
          case ConnectionState.waiting:
          case ConnectionState.active:
            child = Container();
            break;
          case ConnectionState.done:
            if (snapshot.hasData) {
              child = AdWidget(ad: _nativeAd);
            } else {
              child = Text('Error loading $NativeAd');
            }
        }

        return Padding(
          padding: const EdgeInsets.only(bottom: 5.0),
          child: Container(
            height: 80,
            child: child,
            color: Color(0xff23272A),
          ),
        );
      },
    );
  }
}

---

Flutter doctor

Run flutter doctor and paste the output below:

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Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 1.22.6, on Microsoft Windows [Version 10.0.19042.867], locale en-US)

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[!] Android Studio (version 4.1.0)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[√] VS Code (version 1.54.3)
[√] Connected device (1 available)

! Doctor found issues in 1 category.

---

Flutter dependencies

Run flutter pub deps -- --style=compact and paste the output below:

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Dart SDK 2.10.5
Flutter SDK 1.22.6
discord_bots 2.2.0

dependencies:
- cached_network_image 2.5.0 [flutter flutter_cache_manager octo_image]
- cupertino_icons 1.0.0
- custom_navigator 0.2.0 [flutter]
- data_connection_checker 0.3.4
- easy_localization 3.0.0-dev.1 [flutter intl shared_preferences args path flutter_localizations]
- easy_localization_loader 0.0.2 [http csv yaml xml flutter]
- emoji_flag_converter 1.0.0 [flutter]
- firebase_analytics 7.0.1 [meta flutter firebase_core firebase_analytics_web firebase_analytics_platform_interface]
- firebase_core 0.7.0 [firebase_core_platform_interface flutter quiver meta firebase_core_web]
- firebase_crashlytics 0.4.0+1 [flutter stack_trace firebase_core firebase_core_platform_interface firebase_crashlytics_platform_interface]
- flutter 0.0.0 [characters collection meta typed_data vector_math sky_engine]
- flutter_form_builder 4.2.0 [flutter flutter_localizations date_range_picker datetime_picker_formfield dropdown_search flutter_colorpicker flutter_chips_input flutter_datetime_picker flutter_touch_spin flutter_typeahead intl rating_bar signature validators]
- flutter_localizations 0.0.0 [flutter intl characters collection meta path typed_data vector_math]
- flutter_markdown 0.5.2 [flutter markdown meta path]
- flutter_phoenix 0.1.0 [flutter]
- flutter_secure_storage 3.3.5 [meta flutter]
- google_fonts 1.1.2 [flutter http path_provider crypto]
- google_mobile_ads 0.11.0+4 [meta flutter]
- in_app_purchase 0.3.5+1 [async collection flutter json_annotation meta]
- provider 4.3.3 [collection flutter nested]
- rate_my_app 0.7.2 [shared_preferences smooth_star_rating pedantic flutter]
- sentry_flutter 4.0.6 [flutter flutter_web_plugins sentry package_info]
- shared_preferences 0.5.12+4 [meta flutter shared_preferences_platform_interface shared_preferences_linux shared_preferences_macos shared_preferences_web shared_preferences_windows]    
- shimmer 1.1.2 [flutter]
- url_launcher 5.7.10 [flutter url_launcher_platform_interface url_launcher_web url_launcher_linux url_launcher_macos url_launcher_windows]
- visa 1.0.3 [flutter hexcolor http webview_flutter]

dev dependencies:
- flutter_test 0.0.0 [flutter test_api path fake_async clock stack_trace vector_math async boolean_selector characters charcode collection matcher meta source_span stream_channel string_scanner term_glyph typed_data]

transitive dependencies:
- archive 2.0.13 [crypto args path]
- args 1.6.0
- async 2.5.0-nullsafety.1 [collection]
- basic_utils 2.7.1 [http logging json_annotation pointycastle convert crypto]
- boolean_selector 2.1.0-nullsafety.1 [source_span string_scanner]
- characters 1.1.0-nullsafety.3
- charcode 1.2.0-nullsafety.1
- clock 1.1.0-nullsafety.1
- collection 1.15.0-nullsafety.3
- convert 2.1.1 [charcode typed_data]
- crypto 2.1.5 [collection convert typed_data]
- csv 4.1.0
- date_range_picker 1.0.6 [flutter]
- datetime_picker_formfield 1.0.0 [flutter intl]
- dropdown_search 0.4.9 [flutter]
- fake_async 1.2.0-nullsafety.1 [clock collection]
- ffi 0.1.3
- file 5.2.1 [intl meta path]
- firebase 7.3.3 [http http_parser js]
- firebase_analytics_platform_interface 1.0.3 [flutter meta]
- firebase_analytics_web 0.1.1 [flutter flutter_web_plugins firebase firebase_analytics_platform_interface meta]
- firebase_core_platform_interface 3.0.1 [flutter meta plugin_platform_interface quiver]
- firebase_core_web 0.2.1+3 [firebase_core_platform_interface flutter flutter_web_plugins meta js]
- firebase_crashlytics_platform_interface 1.1.6 [flutter meta collection firebase_core plugin_platform_interface]
- flutter_blurhash 0.5.0 [flutter meta]
- flutter_cache_manager 2.1.1 [flutter path_provider uuid http path sqflite pedantic clock file rxdart image]
- flutter_chips_input 1.9.5 [flutter]
- flutter_colorpicker 0.3.5 [flutter]
- flutter_datetime_picker 1.5.0 [flutter]
- flutter_keyboard_visibility 4.0.4 [meta flutter_keyboard_visibility_platform_interface flutter_keyboard_visibility_web flutter]
- flutter_keyboard_visibility_platform_interface 1.0.1 [flutter meta plugin_platform_interface]
- flutter_keyboard_visibility_web 1.0.1 [flutter_keyboard_visibility_platform_interface flutter_web_plugins flutter]
- flutter_touch_spin 1.0.1 [flutter intl]
- flutter_typeahead 1.9.3 [flutter flutter_keyboard_visibility]
- flutter_web_plugins 0.0.0 [flutter characters collection meta typed_data vector_math]
- hexcolor 1.0.6 [flutter flutter_web_plugins]
- http 0.12.2 [http_parser path pedantic]
- http_parser 3.1.4 [charcode collection source_span string_scanner typed_data]
- image 2.1.19 [archive xml meta]
- intl 0.16.1 [path]
- js 0.6.2
- json_annotation 3.1.1
- logging 0.11.4
- markdown 3.0.0 [args charcode meta]
- matcher 0.12.10-nullsafety.1 [stack_trace]
- meta 1.3.0-nullsafety.3
- nested 0.0.4 [flutter]
- octo_image 0.3.0 [flutter flutter_blurhash]
- package_info 0.4.3+4 [flutter]
- path 1.8.0-nullsafety.1
- path_provider 1.6.27 [flutter path_provider_platform_interface path_provider_macos path_provider_linux path_provider_windows]
- path_provider_linux 0.0.1+2 [path xdg_directories path_provider_platform_interface flutter]
- path_provider_macos 0.0.4+8 [flutter]
- path_provider_platform_interface 1.0.4 [flutter meta platform plugin_platform_interface]
- path_provider_windows 0.0.4+3 [path_provider_platform_interface meta path flutter ffi win32]
- pedantic 1.9.2 [meta]
- petitparser 3.1.0 [meta]
- platform 2.2.1
- plugin_platform_interface 1.0.3 [meta]
- pointycastle 2.0.1
- process 3.0.13 [file intl meta path platform]
- quiver 2.1.5 [matcher meta]
- random_string 2.1.0
- rating_bar 0.2.0 [flutter]
- rxdart 0.25.0
- sentry 4.0.6 [http meta stack_trace uuid]
- shared_preferences_linux 0.0.2+4 [file flutter meta path path_provider_linux shared_preferences_platform_interface]
- shared_preferences_macos 0.0.1+11 [shared_preferences_platform_interface flutter]
- shared_preferences_platform_interface 1.0.4 [meta flutter]
- shared_preferences_web 0.1.2+7 [shared_preferences_platform_interface flutter flutter_web_plugins meta]
- shared_preferences_windows 0.0.2+3 [shared_preferences_platform_interface flutter file meta path path_provider_platform_interface path_provider_windows]
- signature 3.2.1 [flutter image]
- sky_engine 0.0.99
- smooth_star_rating 1.1.1 [flutter]
- source_span 1.8.0-nullsafety.2 [charcode collection path term_glyph]
- sqflite 1.3.2+3 [flutter sqflite_common path]
- sqflite_common 1.0.3+1 [synchronized path meta]
- stack_trace 1.10.0-nullsafety.1 [path]
- stream_channel 2.1.0-nullsafety.1 [async]
- string_scanner 1.1.0-nullsafety.1 [charcode source_span]
- synchronized 2.2.0+2
- term_glyph 1.2.0-nullsafety.1
- test_api 0.2.19-nullsafety.2 [async boolean_selector collection meta path source_span stack_trace stream_channel string_scanner term_glyph matcher]
- typed_data 1.3.0-nullsafety.3 [collection]
- url_launcher_linux 0.0.1+4 [flutter]
- url_launcher_macos 0.0.1+9 [flutter]
- url_launcher_platform_interface 1.0.9 [flutter meta plugin_platform_interface]
- url_launcher_web 0.1.5+3 [url_launcher_platform_interface flutter flutter_web_plugins meta]
- url_launcher_windows 0.0.1+3 [flutter]
- uuid 2.2.2 [crypto convert]
- validators 2.0.1 [vin_decoder]
- vector_math 2.1.0-nullsafety.3
- vin_decoder 0.1.3 [meta basic_utils http random_string]
- webview_flutter 1.0.7 [flutter]
- win32 1.7.4+1 [ffi]
- xdg_directories 0.1.2 [meta path process]
- xml 4.5.1 [collection convert meta petitparser]
- yaml 2.2.1 [charcode collection string_scanner source_span]

---

[Tetracyl]

I’ve only tried it on an emulator. I’ll try it on a real device soon and get back to you.

[maheshmnj]

Labeled this issue as fixed considering this is no longer reproducible.

Thanks