Confusing / inaccurate exception when data value has not been set

Given:

• Node with field "field_geo", a complex geolocation field
• Node_empty: a node with only title. Field_geo is blank
• Node_populated: a node with data in field_geo

Observed behavior:

• return value from \Drupal::service('typed_data.data_fetcher')->fetchDataByPropertyPath($Node_populated->getTypedData, 'field_geo.0.lat') is the same as return value from \Drupal::service('typed_data.data_fetcher')->fetchDataByPropertyPath($Node_populated->getTypedData, 'field_geo.lat')
• \Drupal::service('typed_data.data_fetcher')->fetchDataByPropertyPath($Node_empty->getTypedData, 'field_geo.0.lat') throws MissingDataException
• \Drupal::service('typed_data.data_fetcher')->fetchDataByPropertyPath($Node_empty->getTypedData, 'field_geo.lat') throws InvalidArgumentException

Expected behavior:

* Using field_geo.lat should throw MissingDataException, since it is a valid selector