Pages never finish loading on Android

When I try to view my site or other sites using this theme on my Android phone (Samsung Galaxy S4, stock browser, Android v. 4.4.4), pages never finish loading. The browser’s page loading progress bar stops before it can get all the way across.

Some elements appear — the black top bar (minus the social icons), the background image, the whte lines above and below the header, the white boxes containing the posts, the black footer menu (including the search field and green button) — but no text ever shows up, anywhere. No images (other than the background image) load either.

Looking at https://singldemo.wordpress.com, I can even see a light grey SoundCloud icon in the first post, and lots of horizontal grey lines in the second post… but again, no text or images.