title: Material Ui - Unable to enter input textfield/ set values on a controlled component
body: <p>I tried to create a custom input component with inputRef (material ui Input component). Looks like the component reference is working but I'm unable to enter any value in the text field after i set the <strong>value attribute</strong>. I think it's because of the way i implemented the onchange event. I'm not sure what am i missing. Please help.</p>
  
  <p>Here is the codesandbox url</p>
  
  <p><a href="https://codesandbox.io/s/pjlwqvwrvm" rel="nofollow noreferrer">https://codesandbox.io/s/pjlwqvwrvm</a></p>