angular2解析器多次实例化

我对多次实例化Angular2解析器有问题

这是我的功能模块声明（由路由器延迟加载）：

这是有问题的解析器的代码（我们称之为ResolverA）：

问题是，这个解析器被实例化了两次（并且只在一个实例中解析）。第二个实例（注入到组件中）具有未解析的数据。事实上，第二个实例甚至不应该存在，解析器应该是单例的

在这种情况下，控制台输出：

Angular 2 is running in the development mode. Call enableProdMode() to enable the production mode.
Resource NEW
Resource RESOLVE
Resource NEW //THIS SHOULDN'T BE HERE
Reasons: undefined
Reasons: undefined

在angular 2.1.2中按预期工作，但在angular 2.2.4中不起作用。 Typescript版本：2.0.10

---

我的代码是否有问题（自angular 2.2以来发生了变化），或者这被认为是angular中的一个bug？

关于延迟加载模块中的提供程序被多次实例化，存在一个已知问题

---

谢谢。我将把路由器暂时恢复到3.1.1。

import {Resolve, ActivatedRouteSnapshot, RouterStateSnapshot} from "@angular/router";
import {Injectable} from "@angular/core";
import {Observable} from "rxjs";
import {AuthHttp} from "angular2-jwt";

@Injectable()
export class ResolverA implements Resolve<IDataDto> {

    private API_URL = '...';
    private _reasons: IDataDto[];

    constructor(private http: AuthHttp) {
        console.log("Resource NEW");
    }

    resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<any>|Promise<any>|any {
        console.log("Resource RESOLVE");
        return this.http.get(this.API_URL)
            .map(result => result.json())
            .do(result => this._reasons = result);
    }

    get reasons(): IDataDto[] {
        return this._reasons;
    }

}

export interface IDataDto {
    reasonCode: string,
    description: string,
    gainLossType: GainLossType

}

export type GainLossType = "GAIN" | "LOSS";

// All needed imports   

@Component({
    selector: 'componentA',
    template: require('./componentA.template.html')
})
export class ComponentA implements OnInit {


    constructor(private router: Router,
                private timeResolver: TimeResolver,
                private resolverA: ResolverA,
                private messageService: MessageService) {

    }

    ngOnInit(): void {

        // other UI initialization code

        this.initData();
    }


    private initData() {
        let reasons = this.resolverA.reasons; //UNDEFINED!
        console.log("Reasons:", reasons);
    }    
}

Angular 2 is running in the development mode. Call enableProdMode() to enable the production mode.
Resource NEW
Resource RESOLVE
Resource NEW //THIS SHOULDN'T BE HERE
Reasons: undefined
Reasons: undefined