diff --git a/dbus-vis/boost_handler_timeline_vis.js b/dbus-vis/boost_handler_timeline_vis.js
index 63378cb..2b887e5 100644
--- a/dbus-vis/boost_handler_timeline_vis.js
+++ b/dbus-vis/boost_handler_timeline_vis.js
@@ -185,7 +185,8 @@
   const v = boost_asio_handler_timeline_view;
   v.MouseState.x = event.pageX - this.offsetLeft;
   v.MouseState.y = event.pageY - this.offsetTop;
-  if (v.MouseState.pressed == true) {  // Update highlighted area
+  if (v.MouseState.pressed == true &&
+      v.MouseState.hoveredSide == 'timeline') {  // Update highlighted area
     v.HighlightedRegion.t1 = v.MouseXToTimestamp(v.MouseState.x);
   }
   v.OnMouseMove();
@@ -194,7 +195,8 @@
   v.linked_views.forEach(function(u) {
     u.MouseState.x = event.pageX - Canvas_Asio.offsetLeft;
     u.MouseState.y = 0;                  // Do not highlight any entry
-    if (u.MouseState.pressed == true) {  // Update highlighted area
+    if (u.MouseState.pressed == true &&
+        u.MouseState.hoveredSide == 'timeline') {  // Update highlighted area
       u.HighlightedRegion.t1 = u.MouseXToTimestamp(u.MouseState.x);
     }
     u.OnMouseMove();