LoginForm - only one field filled red on verification?

Vaadin 6 / 7 / 8 Framework UI
1

Hello,

When I click submit Form and haven’t selected the both fields before, only the first field will get red.
I recorded it here:

https://1drv.ms/v/s!Av_-QrTeJXiQkORVg1ddS1i258MCAg?e=iU7Mpx

LG
Christian