I solved this issue for my particular scenario where the iframe width was wider than the wpTouch width. I changed the iframe width from a fixed pixel width to “auto”.
Here’s the code that worked, where “auto” was 450px prior to fix:
<iframe src="//www.facebook.com/plugins/like.php?href=https%3A%2F%2Fwww.facebook.com%2FEngageTalentGroup&send=false&layout=standard&width=450&show_faces=false&action=like&colorscheme=light&font&height=35" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:auto; height:35px;" allowTransparency="true"></iframe>