Thanks for using Syncfusion products.
We couldn’t able to reproduce the reported issue at our end. Kindly refer the attached sample implementing your requirement. We would very much appreciate if you could reproduce the issue in the provided sample and get back to us. So, that it would help us to provide a prompt solution.
Note: If the data provided doesn’t meet your requirement please provide as a brief explanation about the issue (if possible a step by step procedure).
Please let us know if you have any concerns.
Thanks for the update.
Kindly refer the below provided video. In the video we have provided demo of two samples. First sample is yours and in the second sample we have connected a DB (since, you have mentioned that the issue is reproduced when connected with a DB). In both the samples the issue is not reproduced at our end. Hence, could you please provide us some more details regarding your requirement?
Please let us know if you have any other concerns.
Thanks & Regards,