When virtualization is turned on and LoadEvent is used, filtering stops working and also when component used from other component, it will refresh data only when scrolling down.
When turned off, works as expected.
link to code: radzen.txt - Google Drive
You can compare your code to our demo where everything works normally:
I"m also experiencing the same issue. We have an API layer were we have to get the data from the API layer before putting it into the DataGrid component.
Do you have an async example?