Page Refresh / Rendering

I’m using HERE Maps (type definitions for HERE Maps API for JavaScript). I have noticed that the marker is not updating like I mentioned it in normal Javascript. For example,after I have set a new zoom map.setZoom() or any other available map method, the map is not being updated. Only after re-entering the page.

But I have found out when Im using an PopoverController and closing the popover window again on an onDidDismiss() method the page is rendering new and the map changes are passed and visible.

So my question, how can I produce a page refresh like when I’m closing a Popover-Page. By the way, tried out with windows.reload function. But in this case I’m losing all initialize page variables.

Thanks in advance, Ionic-Community.