AllowableValues for @ApiParam is not honored by Swagger when request parameter is Collection Array

[SarveshSharma06]

I am working with springfox version 2.9.2

In my spring boot application, I have a RestController with request parameter like:

@ApiParam(allowableValues="one, two, three")
            @RequestParam(name = "expand", required = false) Set<NumberEnum> numbers

I have an Enum class NumberEnum with values {one, two, three, four}

On swagger am expecting to see: "Available values: one, two, three" Instead I see all the 4 enum values.
Here's how my swagger json looks like:

{
            "name": "numbers",
            "in": "query",
            "description": "some desc",
            "required": false,
            "type": "array",
            "items": {
              "type": "string",
              "enum": [
                "one",
                "two",
                "three",
                "four"
              ]
            },
            "collectionFormat": "multi",
            "allowEmptyValue": false,
            "enum": [
              "one",
              "two",
              "three",
              "four"
            ]
          }

Am I doing something wrong here. Please advice.

[SarveshSharma06]

Hi,
It might not be a super critical buggy behavior, but would like to know if it is an actual bug and if there's a workaround on this?
Some insights would be really appreciated.

Thanks.