Sending multiple FileUpload in a separate argument make the request hang forever without errors

[impsdc]

Sending multiple FileUpload in a separate argument make the request hang forever without errors. I'm assuming that the validation makes the thread hang...
Using [email protected], and assuming this ArgType :

@InputType("PageArg")
@ArgsType()
export class PageArg {
	@Field(() => GraphQLUpload)
	originalFile: FileUpload;
}

Validation works :

@Mutation(() => Chapter)
async updateChapter(
          @Arg("pagesFiles", () => [PageArg]) pageFiles: PageArg[],
) {}

Validation hang :

@Mutation(() => Chapter)
async updateChapter(
          @Arg("pagesFiles", () => [PageArg]) pageFiles: PageArg[],
	  @Arg("thumbFile", () => GraphQLUpload) thumbFile: Promise<FileUpload>,
) {
      Thread does not even go here
}

Body from the request :

pages: [
      {
        originalFile: Upload {
          resolve: [Function],
          reject: [Function],
          promise: Promise { <resolved> },
          file: {
            fieldName: "1",
            filename: ...",
            mimetype: "image/jpeg",
            encoding: "7bit",
            createReadStream: [Function: createReadStream],
          },
        },
      }
    ],
    thumbFile: Upload {
      resolve: [Function],
      reject: [Function],
      promise: Promise { <pending> },
    }