When creating an active docs with OpenAPI 3.0 spec for Developer Portal and adding either user_key or app_id/app_key items with "x-data-threescale-name" attribute (trying to take advantage of "Extension to the OAS specification: auto-fill of API keys") to the parameters list of any endpoint, no applications autocomplete is displayed on documentation page.
I've attached to this issue the json responses from 3scale and also a screenshot of the browser's console output.