diff --git a/public/stylesheets/sandbox.css b/public/stylesheets/sandbox.css
index af8d048319..60b9d1b750 100644
--- a/public/stylesheets/sandbox.css
+++ b/public/stylesheets/sandbox.css
@@ -18,6 +18,13 @@ background:purple; color:#555;}
 0.875em/1.286 line height = 14px with 18px leading
 0.643em  = 9px, so {margin: 0.643em auto;} gives you a single blank line between block elements */
 
+/* AO3-6869 -- Workaround for a layout bug in WebKit, triggered by `float` and LiveValidation's placeholder span */
+form#new_abuse_report .footnote {
+  float: none;
+  margin-right: 0;
+  width: fit-content;
+}
+
 /* styling for AO3-3359 to remove top padding from the new button
 and preserve the balance/symmetry of the page */
 #new_work_search fieldset:first-of-type .submit {