diff --git a/app/assets/javascripts/gl_dropdown.js b/app/assets/javascripts/gl_dropdown.js
index cf4a70e321eefbd1498adb21e00abd25e3c3cf5e..64f258aed64ede23dc987d9ba8691a54bacd0496 100644
--- a/app/assets/javascripts/gl_dropdown.js
+++ b/app/assets/javascripts/gl_dropdown.js
@@ -300,7 +300,7 @@ GitLabDropdown = (function() {
             return function(data) {
               _this.fullData = data;
               _this.parseData(_this.fullData);
-              _this.focusTextInput(true);
+              _this.focusTextInput();
               if (_this.options.filterable && _this.filter && _this.filter.input && _this.filter.input.val() && _this.filter.input.val().trim() !== '') {
                 return _this.filter.input.trigger('input');
               }
@@ -790,24 +790,16 @@ GitLabDropdown = (function() {
     return [selectedObject, isMarking];
   };
 
-  GitLabDropdown.prototype.focusTextInput = function(triggerFocus = false) {
+  GitLabDropdown.prototype.focusTextInput = function() {
     if (this.options.filterable) {
-      this.dropdown.one('transitionend', () => {
-        const initialScrollTop = $(window).scrollTop();
+      const initialScrollTop = $(window).scrollTop();
 
-        if (this.dropdown.is('.open')) {
-          this.filterInput.focus();
-        }
-
-        if ($(window).scrollTop() < initialScrollTop) {
-          $(window).scrollTop(initialScrollTop);
-        }
-      });
+      if (this.dropdown.is('.open')) {
+        this.filterInput.focus();
+      }
 
-      if (triggerFocus) {
-        // This triggers after a ajax request
-        // in case of slow requests, the dropdown transition could already be finished
-        this.dropdown.trigger('transitionend');
+      if ($(window).scrollTop() < initialScrollTop) {
+        $(window).scrollTop(initialScrollTop);
       }
     }
   };
diff --git a/app/assets/stylesheets/framework/contextual-sidebar.scss b/app/assets/stylesheets/framework/contextual-sidebar.scss
index 8baf7ca23a4d61e759311ecaf4ecfc7ec0f959db..2e417315ed72e4a7156c75996d8597f9dda48944 100644
--- a/app/assets/stylesheets/framework/contextual-sidebar.scss
+++ b/app/assets/stylesheets/framework/contextual-sidebar.scss
@@ -9,12 +9,6 @@
     padding-left: $contextual-sidebar-width;
   }
 
-  // Override position: absolute
-  .right-sidebar {
-    position: fixed;
-    height: calc(100% - #{$header-height});
-  }
-
   .issues-bulk-update.right-sidebar.right-sidebar-expanded .issuable-sidebar-header {
     padding: 10px 0 15px;
   }
diff --git a/app/assets/stylesheets/framework/dropdowns.scss b/app/assets/stylesheets/framework/dropdowns.scss
index 478269f3fcf47ae687862a5dfc085925d5b55643..bc907a390d8af53b861b111c52459da016b35cb1 100644
--- a/app/assets/stylesheets/framework/dropdowns.scss
+++ b/app/assets/stylesheets/framework/dropdowns.scss
@@ -16,27 +16,18 @@
 
 @mixin set-visible {
   transform: translateY(0);
-  visibility: visible;
-  opacity: 1;
-  transition-duration: 100ms, 150ms, 25ms;
-  transition-delay: 35ms, 50ms, 25ms;
+  display: block;
 }
 
 @mixin set-invisible {
   transform: translateY(-10px);
-  visibility: hidden;
-  opacity: 0;
-  transition-property: opacity, transform, visibility;
-  transition-duration: 70ms, 250ms, 250ms;
-  transition-timing-function: linear, $dropdown-animation-timing;
-  transition-delay: 25ms, 50ms, 0ms;
+  display: none;
 }
 
 .open {
   .dropdown-menu,
   .dropdown-menu-nav {
     @include set-visible;
-    display: block;
     min-height: 40px;
 
     @media (max-width: $screen-xs-max) {
@@ -55,6 +46,11 @@
   }
 }
 
+// Get search dropdown to line up with other nav dropdowns
+.search-input-container .dropdown-menu {
+  margin-top: 11px;
+}
+
 .dropdown-toggle {
   padding: 6px 8px 6px 10px;
   background-color: $white-light;
@@ -214,7 +210,6 @@
 .dropdown-menu,
 .dropdown-menu-nav {
   @include set-invisible;
-  display: block;
   position: absolute;
   width: auto;
   top: 100%;
diff --git a/app/assets/stylesheets/framework/sidebar.scss b/app/assets/stylesheets/framework/sidebar.scss
index 0742c0a2a090d72fa8eeb23eb82200969045a843..d61809cb0a4033d0046b328506dd940a08f9f4a6 100644
--- a/app/assets/stylesheets/framework/sidebar.scss
+++ b/app/assets/stylesheets/framework/sidebar.scss
@@ -90,11 +90,6 @@
 .right-sidebar {
   border-left: 1px solid $border-color;
   height: calc(100% - #{$header-height});
-
-  &.affix {
-    position: fixed;
-    top: $header-height;
-  }
 }
 
 .with-performance-bar .right-sidebar.affix {
diff --git a/app/assets/stylesheets/pages/issuable.scss b/app/assets/stylesheets/pages/issuable.scss
index e19196e0c416dbd0bc9c35e73b72f10c5b463d13..e1637618ab2e8237856b17bb331bc1f82937ed6b 100644
--- a/app/assets/stylesheets/pages/issuable.scss
+++ b/app/assets/stylesheets/pages/issuable.scss
@@ -122,7 +122,7 @@
 }
 
 .right-sidebar {
-  position: absolute;
+  position: fixed;
   top: $header-height;
   bottom: 0;
   right: 0;
@@ -502,7 +502,7 @@
   top: $header-height + $performance-bar-height;
 
   .issuable-sidebar {
-    height: calc(100% - #{$header-height} - #{$performance-bar-height});
+    height: calc(100% - #{$performance-bar-height});
   }
 }
 
diff --git a/app/assets/stylesheets/pages/search.scss b/app/assets/stylesheets/pages/search.scss
index 49c8e546bf2ffc119820623d5793d7d870c71907..c9363188505e6010c413e20d276ae632c376257d 100644
--- a/app/assets/stylesheets/pages/search.scss
+++ b/app/assets/stylesheets/pages/search.scss
@@ -108,13 +108,6 @@ input[type="checkbox"]:hover {
 
     // Custom dropdown positioning
     .dropdown-menu {
-      transition-property: opacity, transform;
-      transition-duration: 250ms, 250ms;
-      transition-delay: 0ms, 25ms;
-      transition-timing-function: $dropdown-animation-timing;
-      transform: translateY(0);
-      opacity: 0;
-      display: block;
       left: -5px;
     }
 
@@ -152,13 +145,6 @@ input[type="checkbox"]:hover {
       background-color: $nav-badge-bg;
       border-color: $border-color;
     }
-
-    .dropdown-menu {
-      transition-duration: 100ms, 75ms;
-      transition-delay: 75ms, 100ms;
-      transform: translateY(7px);
-      opacity: 1;
-    }
   }
 
   &.has-value {