Swagger duplicates operation in spec

We have an interface defined in this way:

public interface OperationSpec {

  @Operation(
      operationId = "spec.random")
  @GET
  @Path("/operation")
  @Produces(ApiMediaType.JSON)
  Response getOperation();
}

And an implementation of OperationSpec:

@Path("/operations")
public class Operation implements OperationSpec {
  @Override
  @JsonView(Views.API.V1.class)
  public Response getOperation() {
      ...
  }
}

For no reason, swagger is generating a spec file with two duplicate operations:

'/operations/operation':
    get:
      operationId: spec.random
...

'/operation':
    get:
      operationId: spec.random_1

Is there any reason for this?

No repository file or test is named. Start by reproducing the duplicate paths with Swagger-Core 2.2.8, JAX-RS 2.1.1, and Jersey 2.39 using the interface and implementation shown; trace how both resource declarations are discovered. Done means identifying the cause and preventing the duplicate operation or documenting the required configuration.