OpenlayersWrapper scroll problems with VectorLayer

I am quite new to Vaadin, using the Openlayersaddon with a VectorLayer.
I get a problem when i select a Vector draw mode like Polygon in the map and then leave my Map-Layout with the mouse to scroll the browser window.
When I return into the map, the VectorLayer Coordinates do not fit my mouse cursor (Blue circle, above/below the mouse).

I couldn’t find anything like this in the Forum or Bugtracker, is it a mistake of myself or a (known) bug of the vectorlayer/openlayerswrapper?

Remove this, if it’s a stupid question. :wink:

Kind regards,