Steps to reproduce:
1. Deploy and navigate to the primefaces-applicant-portlet.
2. Fill out and submit the form.
3. Click the Submit another application button.
4. Click the calendar button.
If the bug still exists, the calendar will not appear.
If the bug is fixed, the calendar will appear.
This issue only manifests itself with PrimeFaces 6.0 (PrimeFaces 5.3 and below are not affected), so it is likely due to PrimeFaces Dynamic Resource Loading. It may also affect other components like pm:inputSlider.
To workaround this issue, avoid using ajax navigation.
To workaround this issue, only use p:commandButton for ajax navigation in PrimeFaces applications.