diff --git a/res/css/structures/_BackdropPanel.scss b/res/css/structures/_BackdropPanel.scss
index 0dbab0a415..b14e670657 100644
--- a/res/css/structures/_BackdropPanel.scss
+++ b/res/css/structures/_BackdropPanel.scss
@@ -31,11 +31,6 @@ limitations under the License.
     z-index: 0;
     pointer-events: none;
     overflow: hidden;
-
-    &:nth-of-type(2n-1) {
-        opacity: 0.2;
-    }
-    &:nth-of-type(2n) {
-        opacity: 0.1;
-    }
+    opacity: 0.2;
+    width: 100%;
 }
diff --git a/res/css/structures/_LeftPanel.scss b/res/css/structures/_LeftPanel.scss
index a172b6c26b..767d5702db 100644
--- a/res/css/structures/_LeftPanel.scss
+++ b/res/css/structures/_LeftPanel.scss
@@ -26,6 +26,7 @@ $roomListCollapsedWidth: 68px;
 .mx_LeftPanel_wrapper {
     display: flex;
     max-width: 50%;
+    position: relative;
 
     .mx_LeftPanel_background {