Greeting from Syncfusion. We have validated your query and tried to replicate the reported issue at our end by created a sample based on provided code snippet. But we are afraid, that we are not able to reproduce the issue at our end. The sample we tried can be downloaded from the below location.
Please find the sample from below link.
Since we are not aware of your exact application scenario, so we request you to try our sample and can you please revert us by modifying the sample or share the screenshot for the issue. This will be helpful for us to investigate further and provide you a better solution at the earliest.
Muneesh Kumar G.