Hi Urvashi,
Greetings from Syncfusion, we have analyzed your query and we were able to reproduce this issue in our Volume 1 2018 release(16.1 version) and this issue is resolved from our Volume 2 2018 release (16.2 version), also recently we have rolled out our Volume 3 2018 release (16.3 version) so we recommend you to update to our latest stable version from the below link. If still issue reproduces in Latest version, please revert us by modifying the sample based on your application along with replication procedure. This would be helpful for us to give better solution.
Thanks,
Michael