JSF calendar does not popup anymore after 2 incorrect edits

How to reproduce

• Create a document of type File
• Edit the document, delete the mandatory title (for save operation to be refused) and change the expiration date -> save operation is refused (watch the URL in the browser URL bar changes)
• Still in the Edit window, delete the mandatory title (for save operation to be refused) and change the expiration date -> save operation is again refused (still the same wrong URL in the browser URL bar)
• Still in the Edit window, delete the mandatory title (for save operation to be refused) and attempt to change the expiration date -> the calendar does not popup

Expected Result :
1) the calendar should display every time needed
2) the URL in the browser URL bar should remain at an expected value