I am testing DE 18.104.22.1684 on a Microsoft Surface Pro 3 with Windows 8.1.
How do I adjust the Preboot screen size? That's a small window to login to.
I would recommend submitting a Product Enhancement Request (PER) (KB60021) for tracking of the behavior and following KB79624 which detail this behavior. Once a workaround is provided, the KB will be updated.