diff --git a/apps/common/main/lib/component/Layout.js b/apps/common/main/lib/component/Layout.js
index c802f1a1a..4fe76c307 100644
--- a/apps/common/main/lib/component/Layout.js
+++ b/apps/common/main/lib/component/Layout.js
@@ -370,7 +370,7 @@ define([
 
         setResizeValue: function (index, value) {
             if (index >= this.splitters.length)
-                return;
+                return false;
 
             var panel = null, next = null, oldValue = 0,
                 resize = this.splitters[index].resizer,
@@ -405,6 +405,7 @@ define([
             if (resize.value != value) {
                 this.doLayout();
             }
+            return (Math.abs(oldValue-value)>0.99);
         }
     });
 
diff --git a/apps/common/main/lib/view/Chat.js b/apps/common/main/lib/view/Chat.js
index 53c90cefb..8d5a6212a 100644
--- a/apps/common/main/lib/view/Chat.js
+++ b/apps/common/main/lib/view/Chat.js
@@ -389,6 +389,7 @@ define([
             if (event && 0 == textBox.val().length) {
                 this.layout.setResizeValue(1, Math.max(this.addMessageBoxHeight, height - this.addMessageBoxHeight));
                 this.textBoxAutoSizeLocked = undefined;
+                this.updateScrolls();
                 return;
             }
 
@@ -409,9 +410,8 @@ define([
 
             height = this.panelBox.height();
 
-            this.layout.setResizeValue(1,
-                Math.max(this.addMessageBoxHeight,
-                    Math.min(height - contentHeight - textBoxMinHeightIndent, height - this.addMessageBoxHeight)));
+            if (this.layout.setResizeValue(1, Math.max(this.addMessageBoxHeight, Math.min(height - contentHeight - textBoxMinHeightIndent, height - this.addMessageBoxHeight))))
+                this.updateScrolls(); // update when resize position changed
         },
 
         updateScrolls: function () {