Steps to reproduce:
- Deploy the attached portlet
- Add the portlet to a widget page
- In the portlet topper, go to Look and Feel Configuration
- Change to use custom title and provide it, or change the application decorator
- Save the config
- The portlet renders successfully.
- The content of the portlet won't be shown after these steps.
See https://github.com/liferay/liferay-js-toolkit/issues/364 for the issue originating this LPS.