I’m currently working on project management tool and for every project there is a gantt chart so when I 1st open a project and view the gantt chart everything seems normal the data is pretty normal even the chart is normal as you can see in the snap shot enter image description here

But when I try to switch project and visit some other project at that time an extra line appears on the grid and also the dates on the time line are vanished, also when I try to zoom in the bars of timeline overrides the grid its only when I refresh everything get back to normal
enter image description here

The issue is only when I switch from one proj to another also I Tried chart.dispose() but as of now nothing seems to work

I also tried removeAllSeries() but I guess it doesnt work for ganttchart