diff --git a/cms/templates/content_libraries/xblock_iframe.html b/cms/templates/content_libraries/xblock_iframe.html
index ca9f39d1ff..47966bc4cd 100644
--- a/cms/templates/content_libraries/xblock_iframe.html
+++ b/cms/templates/content_libraries/xblock_iframe.html
@@ -125,7 +125,10 @@
   <!-- fragment head -->
   {{ fragment.head_html | safe }}
 </head>
-<body>
+<!-- The default stylesheet will set the body min-height to 100% (a common strategy to allow for background
+  images to fill the viewport), but this has the undesireable side-effect of causing an infinite loop via the onResize
+  event listeners below, in certain situations.  Resetting it to the default "auto" skirts the problem.-->
+<body style="min-height: auto">
   <!-- fragment body -->
   {{ fragment.body_html | safe }}
   <!-- fragment foot -->
