Android confirmSignIn erroring with "Value at 'session' failed to satisfy constraint: Member must have length less than or equal to 8192"

[kevinxu3]

Before opening, please confirm:

• I have searched for duplicate or closed issues and discussions.
• I have read the guide for submitting bug reports.
• I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.

JavaScript Framework

React Native

Amplify APIs

Authentication

Amplify Version

v6

Amplify Categories

auth

Backend

Amplify CLI

Environment information

Details

# Put output below this line
 System:
    OS: macOS 15.3.2
    CPU: (8) arm64 Apple M1 Pro
    Memory: 150.92 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.10.0 - /usr/local/bin/node
    npm: 10.2.3 - /usr/local/bin/npm
    Watchman: 2025.03.03.00 - /opt/homebrew/bin/watchman
  Browsers:
    Brave Browser: 136.1.78.94
    Chrome: 136.0.7103.114
    Safari: 18.3.1
  npmPackages:
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    @expo/vector-icons: ^14.0.0 => 14.1.0 
    @google-cloud/recaptcha-enterprise-react-native: 18.7.0-beta01 => 18.7.0-beta01 
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    @react-native-community/cli-platform-android: 15.0.1 => 15.0.1 
    @react-native-community/cli-platform-ios: 15.0.1 => 15.0.1 
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    @react-native-masked-view/masked-view: 0.3.2 => 0.3.2 
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    @react-native/typescript-config: 0.77.1 => 0.77.1 
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    @types/uuid: ^10.0.0 => 10.0.0 (9.0.8)
    ContextAPIMixpanel:  0.0.1 
    MixpanelDemo:  0.0.1 
    SimpleMixpanel:  0.0.1 
    aws-amplify: ^6.15.0 => 6.15.0 
    aws-amplify/adapter-core:  undefined ()
    aws-amplify/adapter-core/internals:  undefined ()
    aws-amplify/analytics:  undefined ()
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    aws-amplify/analytics/kinesis-firehose:  undefined ()
    aws-amplify/analytics/personalize:  undefined ()
    aws-amplify/analytics/pinpoint:  undefined ()
    aws-amplify/api:  undefined ()
    aws-amplify/api/internals:  undefined ()
    aws-amplify/api/server:  undefined ()
    aws-amplify/auth:  undefined ()
    aws-amplify/auth/cognito:  undefined ()
    aws-amplify/auth/cognito/server:  undefined ()
    aws-amplify/auth/enable-oauth-listener:  undefined ()
    aws-amplify/auth/server:  undefined ()
    aws-amplify/data:  undefined ()
    aws-amplify/data/server:  undefined ()
    aws-amplify/datastore:  undefined ()
    aws-amplify/in-app-messaging:  undefined ()
    aws-amplify/in-app-messaging/pinpoint:  undefined ()
    aws-amplify/push-notifications:  undefined ()
    aws-amplify/push-notifications/pinpoint:  undefined ()
    aws-amplify/storage:  undefined ()
    aws-amplify/storage/s3:  undefined ()
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    aws-amplify/storage/server:  undefined ()
    aws-amplify/utils:  undefined ()
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    libphonenumber-js/min/metadata:  undefined ()
    libphonenumber-js/mobile:  undefined ()
    libphonenumber-js/mobile/examples:  undefined ()
    libphonenumber-js/mobile/metadata:  undefined ()
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    react-native-svg: 15.8.0 => 15.8.0 
    react-native-tab-view: ^3.5.2 => 3.5.2 (4.1.0)
    react-native-url-polyfill: ^1.3.0 => 1.3.0 (2.0.0)
    react-redux: ^8.0.7 => 8.1.3 
    react-test-renderer: 18.3.1 => 18.3.1 
    typescript: 5.0.4 => 5.0.4 
    uuid: ^10.0.0 => 10.0.0 (9.0.1, 8.3.2, 7.0.3)
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  npmGlobalPackages:
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    ios-deploy: 1.12.2
    npm: 10.2.3
    typescript: 5.5.3

Describe the bug

Calling confirmSignIn on Android returns regardless of the size of the challengeResponse put in:
Value at 'session' failed to satisfy constraint: Member must have length less than or equal to 8192

This is not an issue on iOS, only Android. Previously when I was still using Auth.sendCustomChallengeAnswer', I could log the User object I passed in and the session` field for the User object was indeed larger than 8192 in length. This was not the case with iOS.

Expected behavior

Should call confirmSignIn successfully.

Reproduction steps

On an Android device.

1. Call signIn
2. Call confirmSignIn

Code Snippet

Log output

Details

// Put your logs below this line
[InvalidParameterException: 1 validation error detected: Value at 'session' failed to satisfy constraint: Member must have length less than or equal to 8192]

aws-exports.js

No response

Manual configuration

No response

Additional configuration

No response

Mobile Device

No response

Mobile Operating System

No response

Mobile Browser

No response

Mobile Browser Version

No response

Additional information and screenshots

No response

[pranavosu]

Hi @kevinxu3, thanks for reporting. We'll try reproducing this and get back to you once we have more information.

Thanks!

[nadetastic]

Hi @kevinxu3 I haven't been able to reproduce this issue. And I get the expected successful sign in. Can you share some code snippets of how you are making the calls? Also can you confirm which confirmSignIn method you are using (EMAIL, SMS, TOTP)?

Also my testing was done with the following versions

"dependencies": {
    "@aws-amplify/react-native": "^1.1.10",

    "aws-amplify": "^6.15.0",

    "expo": "~53.0.9",
 
    "react": "19.0.0",
    "react-dom": "19.0.0",
    "react-native": "^0.79.2",
   
  }

[kevinxu3]

I am using a physical device if that makes a difference. Sometimes it does work which is strange but for the most part it does not. When I log signInOutput I see CONFIRM_SIGN_IN_WITH_CUSTOM_CHALLENGE. This also seems to be a new occurrence since I first noticed it consistently when Google Play was denying my app because they weren't able to sign in.

    // Attempt sign in
    const signInOutput = await signIn({
      username: phoneNumber,
      options: {
        authFlowType: "CUSTOM_WITHOUT_SRP",
      },
    });

    console.log(signInOutput);
    // Send verification code
    await confirmSignIn({ challengeResponse: token });