Please see this link, as the author has posted the exact issue I'm having:
http://efreedom.com/Question/1-7843546/JavaFX-WebView-Screen-Paint-Routines-Become-Interrupted-Immediately-HSQLDB-Connection

Opening webpages, (eg: google) in the webview after this point and mousing over the buttons causes the entire webview to cycle through colors (leaving "pick" colors behind?) and quickly the entire webview becomes dark purple or green except for the last item moused over.