diff --git a/assets/sass/_theme/design-system/header.sass b/assets/sass/_theme/design-system/header.sass
index 7b19cb5323c6b63701c1e9e600cc35e6a53c4438..44a354c2ca8c5ad60e1f309fa6068b4f0bd4a904 100644
--- a/assets/sass/_theme/design-system/header.sass
+++ b/assets/sass/_theme/design-system/header.sass
@@ -62,7 +62,7 @@ body
         z-index: $zindex-body-overlay
 
     html.has-menu-opened &,
-    html.has-modal-opened &
+    html.has-modal-opened &,
     html.has-offcanvas-opened &
         overflow: hidden
         height: 100%
diff --git a/assets/sass/_theme/design-system/nav.sass b/assets/sass/_theme/design-system/nav.sass
index 4b8c63b58f304fefd6a1839419234b64b2a87978..0061906b6fa8c462e835450fbecf216134dfd449 100644
--- a/assets/sass/_theme/design-system/nav.sass
+++ b/assets/sass/_theme/design-system/nav.sass
@@ -55,7 +55,6 @@
             padding: $spacing1
             position: absolute
             max-height: calc(100vh - var(--header-height))
-            max-height: calc(-webkit-fill-available - var(--header-height))
             overflow: auto
         a
             color: $header-dropdown-color