react-native-fs library is not moving or copying files - weird results

Question

  npmPackages:
    @react-native-community/cli: ^4.13.0 => 4.13.0
    react: 16.13.1 => 16.13.1
    react-native: 0.63.3 => 0.63.3
    react-native-windows: Not Found
    react-native-fs: ^2.16.6
    react-native-image-picker: ^2.3.4
  IDEs:
    Android Studio: Version  3.6.0.0 AI-192.7142.36.36.6241897
    Visual Studio: 15.3.26730.12 (Visual Studio Community 2017)

I've been trying to implement a button that opens the camera, takes a picture and saves it to pictures folder.

For this I'm using:

• react-native-image-picker to take the picture
• react-native-fs to move the picture to a filename of my choosing

It's the latter that's giving me a headache. Here's the code I'm using:

<Buttons.Camera containerStyle={{marginBottom:5}}
  onPress={() => {
    ImagePicker.launchCamera(options, async (response) => {
      console.log('Response = ', response);

      if (response.didCancel) {
        // ToDo cancelled
        console.log('Cancellen');
      } else if (response.error) {
        console.log('Camera Error: ', response.error);
      } else {
        var RNFS = require('react-native-fs');
        const ext = response.fileName?.split('.').pop();
        let newPath = `${RNFS.PicturesDirectoryPath}/${options.storageOptions.path}/avatar.${ext}`;
        const result = await RNFS.moveFile(response.path, newPath);
        this.setState({
          avatarPath: newPath,
        });
      }
    });
  }} />

A breakpoint is hit on const result = await RNFS.moveFile(response.path, newPath);. I can confirm that the image does exist in my galary and that newPath and response.path are both valid. When I try to move the file (rename, in fact) I notice that there's no image at newPath and the original image at response.path appears to be corrupted and can't be opened anymore.

According to the docs, result should be true, but in my case it is undefined. The same happens when I use RNFS.exists(newPath). The promise resolves but the result is undefined. No errors are thrown.

Any ideas?