diff --git a/CHANGELOG.md b/CHANGELOG.md
index 017f50c6b31ce7a4a47bf662d68d04609efe5b06..76745df0696d40e4f9979d5e5c139968a53c14b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - CVAT-3D: support lidar data on the server side (<https://github.com/openvinotoolkit/cvat/pull/2534>)
 
 ### Changed
+
 - Updated HTTPS install README section (cleanup and described more robust deploy)
 
 ### Deprecated
@@ -31,6 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed tasks in project autoannotation (<https://github.com/openvinotoolkit/cvat/pull/2725>)
 - Cuboids are missed in annotations statistics (<https://github.com/openvinotoolkit/cvat/pull/2704>)
 - The list of files attached to the task is not displayed (<https://github.com/openvinotoolkit/cvat/pull/2706>)
+- A couple of css-related issues (top bar disappear, wrong arrow position on collapse elements) (<https://github.com/openvinotoolkit/cvat/pull/2736>)
 
 ### Security
 
diff --git a/cvat-ui/package-lock.json b/cvat-ui/package-lock.json
index 91278998c0107cf01badd42908266bd5bb1ed60d..31ff2a23a2720bcf7d6a50a84e7c877bac422902 100644
--- a/cvat-ui/package-lock.json
+++ b/cvat-ui/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "cvat-ui",
-  "version": "1.13.7",
+  "version": "1.13.8",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/cvat-ui/package.json b/cvat-ui/package.json
index a04fa23bd85fc011971900c7b8623c346e2c0665..2945ab9b3a5edf175aaf27e6162ced79bdc78db6 100644
--- a/cvat-ui/package.json
+++ b/cvat-ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cvat-ui",
-  "version": "1.13.7",
+  "version": "1.13.8",
   "description": "CVAT single-page application",
   "main": "src/index.tsx",
   "scripts": {
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-details.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-details.tsx
index 9615d4bfee4f2ddf720d3966b677d5b8521a0b9b..5fe31a23050bcbe44b8327eb46b2ae0982c2f24e 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-details.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-details.tsx
@@ -1,4 +1,4 @@
-// Copyright (C) 2020 Intel Corporation
+// Copyright (C) 2021 Intel Corporation
 //
 // SPDX-License-Identifier: MIT
 
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/styles.scss b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/styles.scss
index b2c6f710c0be1ade792c45c1ff254757194345a5..c000b9046e7de514792a1845f1bf8cf52f4c03b2 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/styles.scss
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/styles.scss
@@ -21,6 +21,7 @@
             height: 25px;
 
             .ant-collapse-arrow {
+                padding: 0;
                 top: $grid-unit-size;
             }
         }
@@ -32,6 +33,7 @@
 
             > .ant-collapse-content-box {
                 padding: 10px;
+                padding-bottom: 0;
             }
         }
     }
@@ -215,6 +217,7 @@
 .cvat-objects-sidebar-state-item-collapse {
     border: 0;
     background: inherit;
+    width: 100%;
 
     > .ant-collapse-item {
         background: inherit;
@@ -226,6 +229,7 @@
             padding-bottom: 2px;
 
             .ant-collapse-arrow {
+                padding: 0;
                 top: $grid-unit-size;
             }
         }
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/styles.scss b/cvat-ui/src/components/annotation-page/standard-workspace/styles.scss
index 498a0dac058f586a1343bccbda0b83bc8b4d2ec3..0d24fd90a8bc5d12959a0fce39cda2b0a781bfe3 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/styles.scss
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/styles.scss
@@ -21,6 +21,12 @@
 
 .cvat-objects-sidebar {
     height: 100%;
+    overflow-y: auto;
+    overflow-x: hidden;
+
+    &.ant-layout-sider-collapsed {
+        overflow: initial;
+    }
 }
 
 .cvat-rotate-canvas-controls-right > svg {
@@ -30,6 +36,8 @@
 .cvat-canvas-controls-sidebar {
     background-color: $background-color-2;
     border-right: 1px solid $border-color-1;
+    overflow-y: auto;
+    overflow-x: hidden;
 }
 
 .cvat-cursor-control,