diff --git a/theme/boost/scss/moodle/drawer.scss b/theme/boost/scss/moodle/drawer.scss
index 5226db123b9..90030e216ad 100644
--- a/theme/boost/scss/moodle/drawer.scss
+++ b/theme/boost/scss/moodle/drawer.scss
@@ -11,6 +11,8 @@ $drawer-offscreen-gutter: 20px !default;
     display: block;
     height: ($fixed-header-y + 10px); /* fixed header height*/
     margin-top: -($fixed-header-y + 10px); /* negative fixed header height */
+    width: 1px;
+    pointer-events: none;
 }
 
 .pagelayout-embedded :target {
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index d18668fee32..2ea9cbaba5f 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -12551,7 +12551,9 @@ span.editinstructions {
   height: 60px;
   /* fixed header height*/
   margin-top: -60px;
-  /* negative fixed header height */ }
+  /* negative fixed header height */
+  width: 1px;
+  pointer-events: none; }
 
 .pagelayout-embedded :target {
   padding-top: initial;
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index e682d12fa45..b0abac7cfba 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -12797,7 +12797,9 @@ span.editinstructions {
   height: 60px;
   /* fixed header height*/
   margin-top: -60px;
-  /* negative fixed header height */ }
+  /* negative fixed header height */
+  width: 1px;
+  pointer-events: none; }
 
 .pagelayout-embedded :target {
   padding-top: initial;