diff --git a/lib/ui/grid/grid.js b/lib/ui/grid/grid.js
index b5be07e..1193c41 100644
--- a/lib/ui/grid/grid.js
+++ b/lib/ui/grid/grid.js
@@ -3537,7 +3537,13 @@ export class Grid {
         }
     }
 
-    _topToIndex(top) {
+    /**
+     * @private
+     * @param {number} top 
+     * @param {boolean} [reload] 
+     * @returns {number}
+     */
+    _topToIndex(top, reload) {
         const rowHeight = (this.rowHeight + 1);
         top -= (top % (rowHeight * 2)) + (RedumCount * rowHeight);
         if (top < 0) {
@@ -3561,7 +3567,7 @@ export class Grid {
      * @returns {number}
      */
     _scrollToTop(top, reload) {
-        const tti = this._topToIndex(top);
+        const tti = this._topToIndex(top, reload);
         top = tti.top;
         if (this._var.scrollTop !== top) {
             this._var.scrollTop = top;