apollo: Error when using the useMutation function

Describe the bug I am getting this error when trying to use the new useMutation function:

TypeError: Cannot read property '$root' of null
    at getAppTracking (loadingTracking.js?b1f0:5)
    at getCurrentTracking (loadingTracking.js?b1f0:25)
    at track (loadingTracking.js?b1f0:50)
    at Object.trackMutation (loadingTracking.js?b1f0:70)
    at useMutation (useMutation.js?89f9:59)
    at useCreatePractitionerMutation (practitioner.ts?1d55:81)
    at useRegisterPractitionerMutation$ (practitioner.ts?1d55:87)
    at tryCatch (runtime.js?96cf:45)
    at Generator.invoke [as _invoke] (runtime.js?96cf:271)
    at Generator.prototype.<computed> [as next] (runtime.js?96cf:97)

To Reproduce Steps to reproduce the behavior:

Also, I know this should have been fixed in alpha.4, but for me the data is still of type any. here is part of my code:

const CREATE_PRACTITIONER = gql`
  mutation createPractitioner($input: CreatePractitionerInput!) {
    createPractitioner(input: $input) {
      clientMutationId
    }
  }
`;
export const useCreatePractitionerMutation = () => {
  return useMutation<
    CreatePractitionerMutation,
    CreatePractitionerMutationVariables
  >(CREATE_PRACTITIONER);
};

export const useRegisterPractitionerMutation = async (practitioner ) => {
 const variables: CreatePractitionerMutationVariables = { input: { practitioner } };

  const { loading, mutate, onError } = useCreatePractitionerMutation();
  const { data } = await mutate(variables, {
    awaitRefetchQueries: true,
    fetchPolicy: "network-only",
    refetchQueries: ["practitionerByPractitionerId"]
  });

  onError(err => useNotifyApolloError(err, errorMessages.FETCH_DATA_ERROR));

  return { loading, data };
};

Expected behavior

Since this is a brand new API I am not even sure that I am using it the correct way. Any help is appreciated! Versions “vue”: “2.6.11” / “2.6.10” “@vue/apollo-composable”: “^4.0.0-alpha.4”, “@vue/apollo-util”: “^4.0.0-alpha.2”, “@vue/composition-api”: “^0.3.4”, “apollo-client”: “^2.6.8”,

Thanks!