Not sure if this is really a bug as such, but beta 2 brings with it the decision to not style input fields as text fields if a type="text" is omitted.
Easy enough to work around of course and perhaps by design.
Just raising as didn't see it in the notes, maybe I missed it,
I'm running into the same exact problem.
Think this was an oversight, we'll look into adding this back in.
add inputs without a type to the text input list Fixes #2205