Hi Alex,
Thanks for contacting Syncfusion support.
We tried a sample with our latest version 17.4.0.51 from our side to reproduce the problem. But the Excel filter displays fine with our sample. We are attaching the sample for your reference.
We suspect that the problem might have occurred because of using custom styles in your application. The custom style might have override the default Grid’s Excel filter dialog styles. So we need more details to proceed further on this and provide you a solution.
- Share the sample which you have tried from your side.
- Share the details of the custom styles you are using in your application.
- Share the Syncfusion version details.
Please refer the screenshot below,
Please get back to us if you need further assistance.
Regards,
Renjith Singh Rajendran.