vtkHoverWidget bug? Strange mouse behaviour

Hi,
I am experiencing a bug with ‘vtkHoverWidget’. When I have the Hoverwidget switched off, the mouse behaviour works fine (as with ‘vtkInteractorStyleImage’), but if I instead switch it off, then on, then off again, then the mouse behaviour is a bit strange, there is what I would call a “drift” while moving the view. Here is my code (minimal example), where the only visible object is a triangle.

I would be very grateful for some help with this issue.
[My installed VTK version is 6.3.0]

File “billiards.cxx”

#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkCellArray.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkHoverWidget.h>
#include <vtkProperty.h>

    int main(){
    	//Draw a triangle
    	auto boundaryPoints = vtkSmartPointer<vtkPoints>::New();
    	boundaryPoints->SetNumberOfPoints(3);
    	boundaryPoints->SetPoint(0, -1, -1, 0);
    	boundaryPoints->SetPoint(1, 1, -1, 0);
    	boundaryPoints->SetPoint(2, 1, 1, 0);
    	auto boundaryLines = vtkSmartPointer<vtkCellArray>::New();
      	boundaryLines->InsertNextCell(4);
    	boundaryLines->InsertCellPoint(0);
    	boundaryLines->InsertCellPoint(1);
    	boundaryLines->InsertCellPoint(2);
      	boundaryLines->InsertCellPoint(0);
    	auto boundary = vtkSmartPointer<vtkPolyData>::New();
      	boundary->SetPoints(boundaryPoints);
      	boundary->SetLines(boundaryLines);
    	auto boundaryMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
      	boundaryMapper->SetInputData(boundary);
      	boundaryMapper->Update();
    	auto boundaryActor = vtkSmartPointer<vtkActor>::New();
      	boundaryActor->SetMapper(boundaryMapper);
      	boundaryActor->GetProperty()->SetColor(1,1,1);
    	auto myTableRenderer = vtkSmartPointer<vtkRenderer>::New();
    	myTableRenderer->AddActor(boundaryActor);
    	myTableRenderer->SetBackground(0,0,0);
    	auto renWin =vtkSmartPointer<vtkRenderWindow>::New();
      	renWin->AddRenderer(myTableRenderer);
    	renWin->SetSize(10000,2000);
    	auto iren =vtkSmartPointer<vtkRenderWindowInteractor>::New();
      	iren->SetRenderWindow(renWin);
    	auto style = vtkSmartPointer<vtkInteractorStyleImage>::New();
      	iren->SetInteractorStyle( style );
      	iren->Initialize();
    	//Set up hoverwidget
      	auto hoverWidget = vtkSmartPointer<vtkHoverWidget>::New();
    	hoverWidget->SetInteractor(iren);
    	hoverWidget->SetTimerDuration(1);
    	//Switching hoverwidget on and off
      	hoverWidget->Off();
    	// /*
    	hoverWidget->On();
    	hoverWidget->Off();
    	// */
    	iren->Start();
    	return EXIT_SUCCESS;
    }

File “CMakeLists.txt”

cmake_minimum_required(VERSION 2.8)

PROJECT(Billiards)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(billiards MACOSX_BUNDLE billiards.cxx)

target_link_libraries(billiards ${VTK_LIBRARIES})

I can also reproduce this on Arch Linux with VTK 8.2.0. Dragging the view with the mouse has a weird drifting effect.