diff --git a/docs/_data/browser-bugs.yml b/docs/_data/browser-bugs.yml
index c33204248e..ab8d621a86 100644
--- a/docs/_data/browser-bugs.yml
+++ b/docs/_data/browser-bugs.yml
@@ -300,6 +300,16 @@
   origin: >
     Bootstrap#16028
 
+-
+  browser: >
+    Safari (iOS)
+  summary: >
+    `position:fixed` is incorrectly positioned when tab bar is visible on iPhone 6S+ Safari
+  upstream_bug: >
+    WebKit#153056
+  origin: >
+    Bootstrap#18859
+
 -
   browser: >
     Safari (iPad Pro)