Control applications submit automatically

Hi all, I have never noticed this before but was doing some work today on the password reset applications and discovered that it appears that all control applications (even a brand new blank one) will try to ‘submit’ (and thus validate) if the user clicks off ‘loose focus’ any field. Is this a recently introduced bug? As I don’t recall it ever doing this before.

So if I have a control form with 2 required fields. I click on the first field type something, click on the second field and get a popup with “field 2 required”. If I check the browser network activity I see that its fired the ajax submission event.

How can I stop this behaviour or control it?