primefaces: Datepicker: change event is triggered with `mask=true` when leaving input without changes

Describe the bug

The first time I pick any date the ajax event is called twice, this can be checked through F12 the first ajax sends an empty date, and the second the value picked.

<p:datePicker id="value"
		      value="#{testView.date}"
		      mask="true"
		      pattern="dd/MM/yyyy"
		      showIcon="true"
		      showOnFocus="false"> 
	<p:ajax event="change" update="date"/>		 
</p:datePicker>	

Reproducer

primefaces-test-master.zip

Expected behavior

The event should be called just once with the correct value.

PrimeFaces edition

Community

PrimeFaces version

12.0.0.RC3

Theme

No response

JSF implementation

Mojarra

JSF version

2

Java version

2.2.20

Browser(s)

No response