Null is show on IE textarea

[tiagowanke]

Hi,
When using this component in combination with reactive forms, if the value of my field is null, the string null is shown to the user.

1. Have a reactive form and set the value as null:
   

2. Use in a textarea element:
   

3. IE shows null:
   

Only on IE browser
Example
https://stackblitz.com/edit/angular-9op1yr