Missing required header \"Content-Type\" for Request [put .....] when requestBody has required: false

[tomasjanda]

Hello, i have problem with PUT operation, when body is optional, in OAS3.1 specified as:

  requestBody:
    required: false
    description: XXXXX
    content:
      application/json:
        schema:
          $ref: '../../common/objects.yaml#/components/schemas/XXXXX'

When request is set with missing Content-Type and Content-Lenght is set to 0, i still got error Missing required header "Content-Type" for Request