On version 4.x, at first load, all groups are shown, when only the first group should be shown.
If you reload data by pressing PagingToolbar's reaload button, the data is shown as expected.
https://examples4.ext.net/#/GridPane...s/GroupPaging/
On version 3.x, everything works as expected.
https://examples3.ext.net/#/GridPane...s/GroupPaging/
Thanks in advance