Steps to Reproduce

1) Launch the Hypershift ROSA wizard in staging environment.

2) Once the user is on the Cluster Settings tab, click on the collapsible 
"Enable external authentication provider".
3) Click on the checkbox Enable external authentication.
4) Enter the valid details and submit the cluster creation button.
5) Once the cluster is in Ready state, navigate to the Access control tab.
6) Click on the button Add external authentication provider and a new dialog opens up.
7) Once the dialog opens up, enter the valid details, upload the PEM file and then clear the file contents. The Reveal button should be disabled.

Expected Result

The CA field should not show any contents as the file was not uploaded.
 
Actual Result
 
Empty section is shown for CA file.

Note: 
For edit operations with CA file, as shown in the recording the reveal button is not disabled when the contents of CA file is erased.