Bootstrap 3 tooltip text dynamically change in Angular2

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 playground</title>
    <script data-require="jquery@2.2.4" data-semver="2.2.4" src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
    
    <link data-require="bootstrap@3.3.7" data-semver="3.3.7" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
    <script data-require="bootstrap@3.3.7" data-semver="3.3.7" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
   
    <link rel="stylesheet" href="style.css" />
    <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
    <script src="config.js"></script>
    <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
  </head>

  <body>
    <my-app>
    loading...
  </my-app>
  </body>

</html>

/* Styles go here */

### Angular Starter Plunker - Typescript

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  //map tells the System loader where to look for things
  map: {
    
    'app': './src',
    
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      defaultExtension: 'js'
    }
  }
});

//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';

platformBrowserDynamic().bootstrapModule(AppModule)

//our root app component
import {Component, NgModule, OnInit} from '@angular/core';
import {BrowserModule} from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';

import { TooltipComponent } from 'src/tooltip.component';

declare let $:any;

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>{{desc}}</h2>
      
      <tooltip-comp [panel]="panelObj"></tooltip-comp> <br>
      
      <input [(ngModel)]="panelObj.tooltipText" style="width: 250px;" />
    </div>
    
    <br><br>
    <h5>Steps to reproduce</h5>
    <ol>
      <li>Just hover over, and notice everything is fine</li>
      <li>Change tooltip text using input box from another component</li>
      <li>Hover over again and keep hovering, notice tooltip text didn't change but keep hovering and notice that vanilla html title also shows up with correct text.</li>
      <li><b>How can I make this work?</b></li>
    </ol>
  `,
})
export class App implements OnInit {
  desc:string = 'Change tooltip text';
  panelObj = {
    tooltipText: "The Power of the "
  };
  
  constructor() {}
  
  ngOnInit() {}
}

@NgModule({
  imports: [ BrowserModule, FormsModule ],
  declarations: [ App, TooltipComponent ],
  bootstrap: [ App ]
})
export class AppModule {}

import {Component, OnInit, OnChanges, Input} from '@angular/core';

@Component({
  selector: 'tooltip-comp',
  template: `
    <div>
      <a id="blah" href="#" data-toggle="tooltip" [attr.data-original-title]="panel.tooltipText">You Don't Know</a> <br><br>
    </div>
  `,
})
export class TooltipComponent implements OnInit, OnChanges {
  @Input() panel: string;
  
  constructor() {}
  
  ngAfterViewInit() {
    $('[data-toggle="tooltip"]').tooltip({container: 'body', html: true});
  }
  
  ngOnInit() {}
}