data-autocomplete-id-field not rendered correct in editorTemplates

[peterdew]

The data-autocomplete-id-field renders incorrect in editorTemplates.

For example : a Model has a propery Work wich in turn has property's OrganisationPlaceNumber and OrganisationPlaceName.

in the view the Work property will be rendered through a EditorFor-helper . In the EditorTemplate for 'Work' the code:
@Html.HiddenFor(model=>model.OrganisationPlaceNumber) renders as:
<input id="Work_OrganisationPlaceNumber" type="hidden"...

But the code
@Html.AutocompleteFor(model => model.OrganisationPlaceName, model => model.OrganisationPlaceNumber, "GetOrganisationPlaces", "Change", false)
renders as
<input class="typeahead tt-hint" data-autocomplete-id-field="OrganisationPlaceNumber" ....
instead of
<input class="typeahead tt-hint" data-autocomplete-id-field="Work_OrganisationPlaceNumber" ....