diff --git a/platform/commonUI/general/res/sass/user-environ/_frame.scss b/platform/commonUI/general/res/sass/user-environ/_frame.scss
index b62d23f188..242b3a9e7e 100644
--- a/platform/commonUI/general/res/sass/user-environ/_frame.scss
+++ b/platform/commonUI/general/res/sass/user-environ/_frame.scss
@@ -23,7 +23,6 @@
     $ohH: $btnFrameH;
     $bc: $colorInteriorBorder;
     &.child-frame.panel {
-        border: 1px solid transparent;
         z-index: 0; // Needed to prevent child-frame controls from showing through when another child-frame is above
         &:not(.no-frame) {
             background: $colorBodyBg;
@@ -91,7 +90,7 @@
 
     &.no-frame {
         background: transparent !important;
-        border: none;
+        border-color: transparent;
         .object-browse-bar .right {
             $m: 0;
             background: rgba(black, 0.3);
diff --git a/platform/commonUI/general/res/sass/user-environ/_selecting.scss b/platform/commonUI/general/res/sass/user-environ/_selecting.scss
index 52747529e6..68e8e3d3a2 100644
--- a/platform/commonUI/general/res/sass/user-environ/_selecting.scss
+++ b/platform/commonUI/general/res/sass/user-environ/_selecting.scss
@@ -20,6 +20,7 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 .s-hover-border {
+    border: 1px solid transparent;
     &:hover {
         border-color: rgba($colorSelectableSelectedPrimary, 0.5) !important;
     }