CustomPress text box doesn't like html with double-quotes

I created a custom field that is a text box. It is to be used for a hyperlink.

If I use double-quotes (""), it breaks.
If I use single-quotes (' '), it works fine.

I'm not sure if this is an issue with CustomPress or Directory, but the custom field is tied to a Directory Listing CPT.

Here's a screenshot of the issue: