The issue can be reproduced using the Filter From Code -> FilterMenu code snippet provided here:
https://docs.telerik.com/blazor-ui/components/grid/filtering#filter-from-code
Hello,
As a workaround, you can use JavaScript to add the k-state-active CSS class as shown in the demo project I have attached as a file. What I did is to:
Regards,
Svetoslav Dimitrov
Progress Telerik