CkEditor and Angular Material 2 Tabs

I use angular-cli, angular-material 2 and I try to use the CKEditor (ng2-ckeditor).

When I insert the CkEditor directly in the HTML (inside one div) there is no issue everything works.

But when I move the CkEditor code under the following structure:

<md-tab-group>
    <md-tab label="Another label description">
        Contents 1
    </md-tab>
    <md-tab label="Label description">
      <div>
        <md-card>
          <md-card-header>
            <md-card-title>
              This is a title
            </md-card-title>
          </md-card-header>
          <md-card-content>
            <ckeditor name="htmlTextValue"
                      [(ngModel)]="ckeditorContent"
                      [config]="{uiColor: '#99000'}"
                      (change)="onChange($event)"
                      (ready)="onReady($event)"
                      (focus)="onFocus($event)"
                      (blur)="onBlur($event)"
                      debounce="500">
            </ckeditor>
          </md-card-content>
        </md-card>
      </div>
    </md-tab>
  </md-tab-group>

it fails and here is the stacktrace from the console:

ERROR TypeError: Cannot read property 'unselectable' of null
    at b (ckeditor.js:331)
    at a.<anonymous> (ckeditor.js:327)
    at a.m (ckeditor.js:10)
    at a.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js:12)
    at a.CKEDITOR.editor.CKEDITOR.editor.fire (ckeditor.js:13)
    at a.fireOnce (ckeditor.js:12)
    at a.CKEDITOR.editor.CKEDITOR.editor.fireOnce (ckeditor.js:13)
    at Object.<anonymous> (ckeditor.js:251)
    at e (ckeditor.js:231)
    at Object.load (ckeditor.js:231)

Here are the important info from the package.json:

"dependencies": {
    "@angular/animations": "^4.1.1",
    "@angular/common": "^4.1.1",
    "@angular/compiler": "^4.1.1",
    "@angular/core": "^4.1.1",
    "@angular/forms": "^4.1.1",
    "@angular/http": "^4.1.1",
    "@angular/material": "^2.0.0-beta.3",
    "@angular/platform-browser": "^4.1.1",
    "@angular/platform-browser-dynamic": "^4.1.1",
    "@angular/router": "^4.1.1",
    "core-js": "^2.4.1",
    "hammerjs": "^2.0.8",
    "ng2-ckeditor": "^1.1.8",
    "rxjs": "^5.1.0",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@angular/cli": "1.0.2",
    "@angular/compiler-cli": "^4.1.1",
    "@types/hammerjs": "^2.0.34",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0",
    "typescript": "~2.2.0"
  }

Here is my the code for my component:

  ckeditorContent = 'This is a text';

  onChange($event) {
    console.log('Change');
    console.log($event);

  }

  onReady($event) {
    console.log('OnReady');
    console.log($event);

  }

  onFocus($event) {
    console.log('Focus');
    console.log($event);
  }

  onBlur($event) {
    console.log('Blur');
    console.log($event);
  }

I tried the ckeditor builder as well in order to add the divarea plugin but with no luck.

Unfortunately I cannot create a plunker for this since angular-cli is not supported right now.

Do you have any idea why? Thank you in advance.