The dropcap is fine on first load. When navigating to the same page, or back/forward to the page from another page, the dropcap grows to the wrong height (default 3 line height?). This is oddly only happening with one of the fonts, Playfair Display. It does not occur with the text set to Lato. Both fonts are included via Google Fonts default LINK method. I've made a test page highlighting the issue:
http://www.joshuawinn.com/examples/dropcap/dropcap.html
And screenshot of first load and navigating to same page via link:
