Hi Swagger,
Thanks for contacting Syncfusion support,
Basically the pivot table component works in response. So, its columns are stretches based on the width of the component you have set. This is the default behavior. To avoid this kindly set allowAutoResizing property in gridSettings as “false”. We have prepared a sample for you please find it below.
Please let us know if you have any other queries we are happy to assist you.
Regards,
Mouli