Hi Madhavacharta,
Greetings from Syncfusion support.
We have validated the reported issue and we are able to reproduce the reported issue with the provided sample. We have confirmed it is a bug and logged the defect report for the same “CheckBox Filter Searching is not working properly”. Thank you for taking the time to report this issue and helping us improve our product. Fix for the issue will be included in our weekly patch release which is expected to be rolled out by mid of October 2020.
You can now track the current status of your request, review the proposed resolution timeline, and contact us for any further inquiries through this link.
Till then we appreciate your patience.
Regards,
Jeevakanth SP.