diff --git a/frontend/app/components/wp-table/timeline/wp-timeline-cell-mouse-handler.ts b/frontend/app/components/wp-table/timeline/wp-timeline-cell-mouse-handler.ts
index 7d363d6101..edcb233147 100644
--- a/frontend/app/components/wp-table/timeline/wp-timeline-cell-mouse-handler.ts
+++ b/frontend/app/components/wp-table/timeline/wp-timeline-cell-mouse-handler.ts
@@ -165,7 +165,8 @@ export function registerWorkPackageMouseHandler(this: void,
         const widthInDays = offsetDayCurrent - offsetDayStart;
         const moved = renderer.onDaysMoved(wp, dayUnderCursor, widthInDays, mouseDownType);
         renderer.assignDateValues(wp, moved);
-        renderer.update(cell, bar, renderInfo);
+        wpCacheService.updateWorkPackage(wp);
+
       };
 
       cell.onmouseleave = () => {
diff --git a/frontend/app/components/wp-table/timeline/wp-timeline.header.ts b/frontend/app/components/wp-table/timeline/wp-timeline.header.ts
index 99124c2aa1..1264c1b414 100644
--- a/frontend/app/components/wp-table/timeline/wp-timeline.header.ts
+++ b/frontend/app/components/wp-table/timeline/wp-timeline.header.ts
@@ -198,6 +198,27 @@ export class WpTimelineHeader {
       this.headerCell = jQuery(cssClassHeader)[0];
       this.outerHeader = jQuery(cssHeaderContainer);
       this.setupScrollbar();
+
+
+
+      // TODO TEST
+
+      // const b = document.createElement("div");
+      // b.style.display = "block";
+      // b.style.position = "absolut";
+      // b.style.left = "50px";
+      // b.style.top = "10px";
+      // b.style.backgroundColor = "red";
+      // b.style.width = "50px";
+      // b.style.height = "50px";
+      // b.style.zIndex = "99999";
+      //
+      // this.headerCell.appendChild(b);
+      // console.log(b);
+
+
+
+      // TODO TEST
     }
 
     this.containerHeight = jQuery(cssClassTableContainer).outerHeight() + this.headerHeight;