Lines disappear when zoom or pan

I use Graphic3d_ArrayOfPolylines to draw 10,000s lines at XY plane and it works well.

But when I zoom or pan, some time those lines just disappear.

Here is the code.

void Renderer::AddPolyLines(Handle(Graphic3d_ArrayOfPolylines) array_of_lines)
{
	if (array_of_lines->BoundNumber() > 0) {
		m_PolyLineGroup->SetGroupPrimitivesAspect(m_LineAspect->Aspect());
		m_PolyLineGroup->AddPrimitiveArray(array_of_lines);
		m_prsPresentation->Display();
		m_View->Update();
	}
}