It appears that when using email as the input type for an input field, jQuery Mobile does not correctly attach necessary styles. I've got a stripped down version of the code I'm using here:
Here's the raw code:
and the rendered:
Easy to duplicate.
This is a recent regression caused by decoupling. It affects email, url and tel inputs:
Thanks for your pull, but we have more types to fix up so we'll fix this on our end and you can close that pull. Thanks for your help!