diff --git a/app/javascript/vue/mixins/stackableHeadersMixin.js b/app/javascript/vue/mixins/stackableHeadersMixin.js
index 38c3b9344..c9bbffe74 100644
--- a/app/javascript/vue/mixins/stackableHeadersMixin.js
+++ b/app/javascript/vue/mixins/stackableHeadersMixin.js
@@ -54,7 +54,6 @@ export default {
         this.secondaryNavigation.style.zIndex = 252;
       } else {
         this.secondaryNavigation.style.boxShadow = 'none';
-        if (secondaryNavigationTop > 10) this.secondaryNavigation.style.zIndex = 11;
       }
 
       if (headerTop - 5 < this.taskSecondaryMenuHeight) { // When secondary navigation touch header
diff --git a/app/javascript/vue/shared/isInViewPort.js b/app/javascript/vue/shared/isInViewPort.js
index 334391102..fb14bc191 100644
--- a/app/javascript/vue/shared/isInViewPort.js
+++ b/app/javascript/vue/shared/isInViewPort.js
@@ -1,4 +1,4 @@
-export function isInViewPort(el) {
+export default function isInViewPort(el) {
   const rect = el.getBoundingClientRect();
 
   return (
@@ -6,9 +6,9 @@ export function isInViewPort(el) {
     rect.left >= 0 &&
     rect.bottom <=
       (window.innerHeight ||
-        document.documentElement.clientHeight) /*or $(window).height() */ &&
+        document.documentElement.clientHeight) &&
     rect.right <=
       (window.innerWidth ||
-        document.documentElement.clientWidth) /*or $(window).width() */
+        document.documentElement.clientWidth)
   );
 }
diff --git a/app/javascript/vue/shared/menu_dropdown.vue b/app/javascript/vue/shared/menu_dropdown.vue
index 436bfba11..f3adf3c69 100644
--- a/app/javascript/vue/shared/menu_dropdown.vue
+++ b/app/javascript/vue/shared/menu_dropdown.vue
@@ -63,7 +63,7 @@
 
 <script>
 
-import { isInViewPort } from './isInViewPort.js';
+import isInViewPort from './isInViewPort.js';
 
 export default {
   name: 'DropdownMenu',
@@ -116,7 +116,10 @@ export default {
     updateOpenDirectoin() {
       if (!this.showMenu) return;
 
-      this.openUp = !isInViewPort(this.$refs.flyout);
+      this.openUp = false;
+      this.$nextTick(() => {
+        this.openUp = !isInViewPort(this.$refs.flyout);
+      });
     }
   }
 }