SmartGWT start beyond end of rows

* SmartGWT 4.0
I using the ListGrid - FilterEditor:
setShowFilterEditor(true);
setFilterOnKeypress(true);

And using the setDatasource(url) to fetchData;

When I input words into the ListGrid filter editor,
[ERROR] [SmartX] - 15:06:54.267:selectionchange6:WARN:ResultSet:isc_R esultSet_0 (created by: isc_ListGrid_0):getRange(1, 2): start beyond end of rows, returning empty list
[ERROR] [SmartX] - 15:06:54.268:selectionchange6:WARN:ResultSet:isc_R esultSet_0 (created by: isc_ListGrid_0):getRange(2, 3): start beyond end of rows, returning empty list
[ERROR] [SmartX] - 15:06:54.268:selectionchange6:WARN:ResultSet:isc_R esultSet_0 (created by: isc_ListGrid_0):getRange(3, 4): start beyond end of rows, returning empty list
[ERROR] [SmartX] - 15:06:54.268:selectionchange6:WARN:ResultSet:isc_R esultSet_0 (created by: isc_ListGrid_0):getRange(4, 5): start beyond end of rows, returning empty list
[ERROR] [SmartX] - 15:06:54.269:selectionchange6:WARN:ResultSet:isc_R esultSet_0 (created by: isc_ListGrid_0):getRange(5, 6): start beyond end of rows, returning empty list