Occasionally missing fields for OAuth2 Administration edit Client ID/Secret modals

Steps to reproduce:

1. Navigate to Control Panel > Configuration > OAuth2 Administration and add a new application
2. Once the application is added, click on the edit button (pencil icon) underneath the Client ID field to open up the edit modal
3. Close the edit modal
4. Click the same edit button again

Actual result:
All of the fields within the modal are missing. This happens every time you open up the modal again after the first time. Refreshing the page resets this behavior.

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7.22
portal master Git SHA 18cf21115794f670fd35af5ae9717f7ccc0cb2d2