diff --git a/management/univention-web/js/widgets/Grid.js b/management/univention-web/js/widgets/Grid.js
index bf13f439ff..56930c2925 100644
--- a/management/univention-web/js/widgets/Grid.js
+++ b/management/univention-web/js/widgets/Grid.js
@@ -332,8 +332,7 @@ define([
 		},
 
 		_onScroll: function() {
-			var isActiveTab = !!document.getElementById(this.id).offsetParent;
-			if (!isActiveTab) {
+			if (!this._isActiveTab()) {
 				return;
 			}
 			var viewPortHeight = dojoWindow.getBox().h;
@@ -344,12 +343,17 @@ define([
 			}
 		},
 
+		_isActiveTab: function() {
+			var isActiveTab = !!document.getElementById(this.id).offsetParent;
+			return isActiveTab;
+		},
+
 		_heightenGrid: function(extension) {
 			var gridHeight = style.get(this._grid.domNode, "height");
 			var newMaxGridHeight = gridHeight + extension;
 			style.set(this._grid.domNode, "max-height", newMaxGridHeight + 'px');
 			this._grid.resize();
-			var gridIsFullyRendered = this._grid.domNode.scrollHeight < newMaxGridHeight;
+			var gridIsFullyRendered = this._isActiveTab() && this._grid.domNode.scrollHeight < newMaxGridHeight;
 			if (gridIsFullyRendered) {
 				this._updateFooterContent();
 				this._scrollSignal.remove();