Hi Mahlon,
I was able to replicate this behaviour. It appears that adding any actions to the Focus event of a field or text input causes the field or text input to lose focus. I have created a ticket for the development team to investigate and will keep you posted with any updates via this thread.
For now, you will need to use a different set of actions that does not rely on the focus event for validating that an email address has been entered. Sorry for the inconvenience.
-Audisho