Date-time not saving if filled by autofill

[newghost]

Strage event... I have e form filled by autofill. All perfect but when saving form,date-fields are not saved (are saved filled with current date-time values). If I fill date-fields by popup or typing directly in field all works fine... any ideas ?
UPDATE: After some tests I noticed using DATE plugin instead of JDATE plugin solves issue

 

[troester]

Issue is replicatable but seems to be an old F3 issue.