Hi Techlandandyzhang,
Greetings from Syncfusion support
By default, in our EJ2 Grid, Virtualization is only used for loading the large amount of data without performance degradation. We have checked your shared information and we could see that your datasource contains 25 records only. Since you have less amount of datasource, there is no usage of using virtualization feature. So, we suggest you remove the virtualization to overcome your problem.
Regards,
Rajapandi R