Error changing value in <tx:date> tag

If you change the value of an <tx:date> field in your form so that all is fine (no errors on this field) and you have another field getting an error (e.g. required) you will fallback to the form site. Normally the changed temporary value has to be reflected in the <tx:date> field (that works with other tags). But what you get to see is the stored original backing bean value.