TSThavasianand Sankaranarayanan Syncfusion Team February 22, 2019 05:10 AM
Greetings from the Syncfusion.
We have prepared the sample with custom tooltip based on our documentation sample. But we are unable to reproduce the reported issue in that sample. The tooltip will be shown perfectly in the Grid. So we have attached the sample for your reference and that can be download from the below link,