To reproduce:

• Visit https://bodhi.fedoraproject.org
• Type kalev in the search box at the top of the screen

In Firefox, a popup appears to display search results.

In Epiphany, a relayout occurs and the search box is closed. It's as if I had never searched for anything. In the web inspector, I see the following errors:

• Refused to connect to 'wss://hub.fedoraproject.org:9939' because it violates the following Content Security Policy directive: "connect-src https://*.fedoraproject.org/ wss://hub.fedoraproject.org:9939/".
• SecurityError: DOM Exception 18: An attempt was made to break through the security policy of the user agent. (With a stacktrace indicating that web socket creation was blocked.)
• Failed to load resource: the server responded with a status of 404 (Not Found): https://bodhi.fedoraproject.org/static/bootstrap/css/bootstrap.css.map
• Failed to load resource: the server responded with a status of 404 (Not Found): https://bodhi.fedoraproject.org/static/js/jquery-1.10.2.min.map

It smells like a WebKit bug but I'm not sufficiently familiar with CSP to say that; maybe the extra forward slash at the end of the URLs is causing problems?