Steps to reproduce:
1) Add RadScrollablePanel
2) Add RadTextBox control into the RadScrollablePanel
3) Set the RightToLeft property of the to RadScrollablePanel to Yes
4) Set the following properties of the RadTextBox:
this.radTextBox1.AutoSize = false;
this.radTextBox1.Multiline = true;

Expected Result: The horizontal scrollbar is working properly
Actual Result: The horizontal scrollbar of the RadScrollablePanel is showing but is not working