Moya: Status code 405 returned for the first POST call of the app even when POST is an allowed method on the API.

Moya version ->10.0.1

I am made a LoginAPI class with following method implementation.

public var method: Moya.Method {
        return .post
    }

The Login Service allows only POST HTTP method. The issue is even after specifying Moya method as POST, the service response returns 405 status code in service call first time. If I retry the same call, status code 200 is returned.

Logs with 405 status code: Request: https://myURL/login Moya_Logger: [07/01/2018 21:08:54] Request Headers: [“Content-Type”: “application/json”] Moya_Logger: [07/01/2018 21:08:54] HTTP Request Method: POST Moya_Logger: [07/01/2018 21:08:54] Request Body: {“password”:”password”,”email”:”abc@del.com”} Moya_Logger: [07/01/2018 21:08:54] Response: <NSHTTPURLResponse: 0x608000038ac0> { URL: Request: https://myURL/login } { Status Code: 405, Headers { Allow = ( POST ); Date = ( “Sun, 07 Jan 2018 15:35:42 GMT” ); “Transfer-Encoding” = ( Identity ); } }

Logs with 200 Status code: Request: https://myURL/login Moya_Logger: [07/01/2018 21:12:35] Request Headers: [“Content-Type”: “application/json”] Moya_Logger: [07/01/2018 21:12:35] HTTP Request Method: POST Moya_Logger: [07/01/2018 21:12:35] Request Body: {“password”:”password”,”email”:”abc@del.com”} Moya_Logger: [07/01/2018 21:12:38] Response: <NSHTTPURLResponse: 0x60400043ab80> { URL: Request: https://myURL/login } { Status Code: 200, Headers { “Content-Type” = ( “application/json;charset=UTF-8” ); Date = ( “Sun, 07 Jan 2018 15:39:26 GMT” ); “Transfer-Encoding” = ( Identity ); } }

Points to note:

1. This url works perfectly in Postman everytime with 200 status code with POST method.
2. On simulator, this is the behavior first time I run the app (fresh launch of the app). On next run or on retrying , it works.
3. Tested the api call by refactoring it to an Alamofire call, it works.

Could someone please help with what could be the possible cause for this?