diff --git a/management/univention-management-console-frontend/umc/widgets/ModuleHeader.js b/management/univention-management-console-frontend/umc/widgets/ModuleHeader.js
index 1f528f3..7947793 100644
--- a/management/univention-management-console-frontend/umc/widgets/ModuleHeader.js
+++ b/management/univention-management-console-frontend/umc/widgets/ModuleHeader.js
@@ -63,23 +63,25 @@ define([
 		_stickyTimer: null,
 
 		_stickyHeaderTopPadding: null,
-
 		_getStickyHeaderTopPadding: function() {
-			var stickyHeaderNode = put(document.body, 'div.umcModuleHeader.dijitOffscreen > div.umcModuleHeaderSticky');
-			this._stickyHeaderTopPadding =  geometry.getPadExtents(stickyHeaderNode).t;
-			put(stickyHeaderNode.parentNode, '!');
+			if (!this._stickyHeaderTopPadding) {
+				var stickyHeaderNode = put(document.body, 'div.umcModuleHeader.dijitOffscreen > div.umcModuleHeaderSticky');
+				this._stickyHeaderTopPadding =  geometry.getPadExtents(stickyHeaderNode).t;
+				put(stickyHeaderNode.parentNode, '!');
+			}
+			return this._stickyHeaderTopPadding;
 		},
 
 		_moduleHeaderTopPadding: null,
-
 		_getModuleHeaderTopPadding: function() {
-			var moduleHeaderNode = put(document.body, 'div.umcModuleHeader.dijitOffscreen > div.umcModuleHeaderOuterContainer');
-			this._moduleHeaderTopPadding =  geometry.getPadExtents(moduleHeaderNode).t;
-			put(moduleHeaderNode.parentNode, '!');
+			if (!this._moduleHeaderTopPadding) {
+				var moduleHeaderNode = put(document.body, 'div.umcModuleHeader.dijitOffscreen > div.umcModuleHeaderOuterContainer');
+				this._moduleHeaderTopPadding =  geometry.getPadExtents(moduleHeaderNode).t;
+				put(moduleHeaderNode.parentNode, '!');
+			}
+			return this._moduleHeaderTopPadding;
 		},
 
-		_moduleHeaderHeight: null,
-
 		postMixInProperties: function() {
 			this.inherited(arguments);
 			this._stickyTimer = new Deferred();
@@ -104,13 +106,14 @@ define([
 			return Boolean(this.domNode.offsetParent);
 		},
 
+		_moduleHeaderHeight: null,
 		_updateStickyHeader: function() {
 			if (!this._isModuleFocused()) {
 				return;
 			}
 			var scroll = geometry.docScroll();
 			var bboxHeader = geometry.getMarginBox('umcHeader');
-			var topPaddingDifference = this._moduleHeaderTopPadding - this._stickyHeaderTopPadding;
+			var topPaddingDifference = this._getModuleHeaderTopPadding() - this._getStickyHeaderTopPadding();
 			var sticky = scroll.y >= bboxHeader.h + bboxHeader.t + topPaddingDifference;
 			if (sticky) {
 				this._moduleHeaderHeight = this._moduleHeaderHeight || geometry.getContentBox(this.domNode).h;
@@ -119,6 +122,8 @@ define([
 			} else if (this._moduleHeaderHeight) {
 				this._removeModuleHeaderHeight();
 				this._moduleHeaderHeight = 0;
+				this._stickyHeaderTopPadding = null;
+				this._moduleHeaderTopPadding = null;
 			}
 			domClass.toggle(this._outerContainer.domNode, 'umcModuleHeaderSticky', sticky);
 		},