Dropdown OnSelect and OnChange Actions not firing
<p>I added a textbox called <code>TextBox1</code> to my <code>PowerApps</code> form.</p>

<p>Then in the <code>OnSelect</code> and <code>OnChange</code> Actions/Events I add the following code</p>

<pre><code>TextBox1.Text="Hallo world"
</code></pre>

<p>When I run the app and change the select values in the dropdown then the textbox text does not change.</p>

<p>Why does the <code>OnChange</code> or <code>OnSelect</code> events not get triggered?</p>