Thank you for the details.
I can suggest checking inside render to see the value of the array passed to the Grid. If the array is empty, then this is connected to the application logic as it seems that the prop responsible for the data is empty.
If the array is not empty, but the Grid still shows empty, please share an example or at least a source code of the Modal with the Grid as this will help us inspect it locally to determine what could be causing this
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