fix(igxGrid): Fixed order in filteredSortedData #6640

Author: Vasil Mihalkov

projects/igniteui-angular/src/lib/grids/grid-base.directive.ts

@@ -2913,7 +2913,8 @@ export class IgxGridBaseDirective extends DisplayDensityBase implements
     public setFilteredSortedData(data, pinned: boolean) {
         if (this._pinnedRecordIDs.length > 0 && pinned) {
             this._filteredSortedPinnedData = data;
-            this.filteredSortedData = [... this._filteredSortedPinnedData, ... this._filteredSortedUnpinnedData];
+            this.filteredSortedData = this.isRowPinningToTop ? [... this._filteredSortedPinnedData, ... this._filteredSortedUnpinnedData] :
+            [... this._filteredSortedUnpinnedData, ... this._filteredSortedPinnedData];
         } else if (this._pinnedRecordIDs.length > 0 && !pinned) {
             this._filteredSortedUnpinnedData = data;
         } else {