Hi Sudha,
Thank you for your update.
Could you please let u know whether there are any changes in your application after applying the patch? Be On further analysis we found out that the issue occurs when we assign a RichTextBox in a GridInCell celltype. Could you please check the below sample and let us know whether this Is the only issue you are reproducing. Or could you please share us your sample so that we can test from our end and can give you a fix so it includes all the scenario that you are expecting. If you could confirm us then we will provide you the patch for this issue in the incident #146308.
Sample: https://www.syncfusion.com/downloads/support/forum/120938/ze/samples-1097275288.zip And also the Essential Studio Vol4 2015 version will be released in the end of this month i.e.., Dec 2015.
Please let us know if you need any further assistance.
Regards,
Anish.