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javascript - Firebase Storage: string does not match format base64: invalid character found. Only when debug is off

I'm trying to upload an image file to firebase storage, save the download URL, and load it after the upload is completed. When I run the app with debug js remotely on it works fine. When I turn off debug mode it stops working with the invalid format exception. The same happens when I run in a real device (both iOS and Android)

The base64 response data from React Native Image Picker seems to be correct

Here's my code

...
import * as ImagePicker from 'react-native-image-picker'; //0.26.10
import firebase from 'firebase'; //4.9.1
...

handleImagePicker = () => {
    const { me } = this.props;
    const options = {
      title: 'Select pic',
      storageOptions: {
        skipBackup: true,
        path: 'images'
      },
      mediaType: 'photo',
      quality: 0.5,
    };
    ImagePicker.showImagePicker(options, async (response) => {
        const storageRef = firebase.storage().ref(`/profile-images/user_${me.id}.jpg`);

        const metadata = {
          contentType: 'image/jpeg',
        };

        const task = storageRef.putString(response.data, 'base64', metadata);
        return new Promise((resolve, reject) => {
          task.on(
            'state_changed',
            (snapshot) => {
              var progress = (snapshot.bytesTransferred / snapshot.totalBytes) * 100;
              console.log('Upload is ' + progress + '% done');
            },
            (error) =>
              console.log(error),
            () => {
              this.onChangeProfileImage();
            }
          );
        });
     }
}

onChangeProfileImage = async () => {
    const { me } = this.props;

    const storageRef = firebase.storage().ref(`/profile-images/user_${me.id}.jpg`);

    const profileImageUrl = await new Promise((resolve, reject) => {
      storageRef.getDownloadURL()
      .then((url) => {
        resolve(url);
      })
      .catch((error) => {
        console.log(error);
      });
    });


  // some more logic to store profileImageUrl in the database

  }

Any idea how to solve this?

Thanks in advance.

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