title: Angular material tooltip problem with ChangeDetectionStrategy.OnPush
body: <p>I have a table with tooltips inside rows:</p>
  <pre><code> &lt;ng-container matColumnDef=&quot;icons&quot;&gt;
      &lt;th mat-header-cell *matHeaderCellDef&gt;#&lt;/th&gt;
      &lt;td mat-cell *matCellDef=&quot;let element&quot;&gt;
        &lt;span [matTooltip]=&quot;'Hello, world'&quot; matTooltipPosition=&quot;below&quot;
          &gt;tooltip&lt;/span&gt;
      &lt;/td&gt;
    &lt;/ng-container&gt;
  </code></pre>
  <p>The table can have thousands of rows, that's why I have to use <code>ChangeDetectionStrategy.OnPush</code>. However, with such detection strategy I have a problem with tooltips - they are shown without text. StackBlitz demo is <a href="https://stackblitz.com/edit/tooltip-and-changedetectionstrategy-onpush?file=src%2Fapp%2Fapp.component.html,src%2Fapp%2Fapp.component.ts" rel="nofollow noreferrer">here</a>. Could anyone say how to fix it?</p>