vtkbool: sometimes it does not work when connect some tubes

Hello developer. I get an error when I use vtkPolyDataBooleanFilter to connect some tubes.

    array<double, 3> point1{0.001,10.122,100.000};
    array<double, 3> point2{-0.000,-10.128,100.000};

    array<double, 3> point3{10.125,-0.003,99.995};
    array<double, 3> point4{-10.124,-0.002,100.005};

    array<double, 3> point5{7.160,7.157,100.000};
    array<double, 3> point6{-7.159,-7.162,100.000};

    auto line1 = vtkSmartPointer<vtkLineSource>::New();
    line1->SetPoint1(point1.data());
    line1->SetPoint2(point2.data());

    auto line2 = vtkSmartPointer<vtkLineSource>::New();
    line2->SetPoint1(point3.data());
    line2->SetPoint2(point4.data());

    auto line3 = vtkSmartPointer<vtkLineSource>::New();
    line3->SetPoint1(point5.data());
    line3->SetPoint2(point6.data());

    auto tube1 = vtkSmartPointer<vtkTubeFilter>::New();
    tube1->SetRadius(3);
    tube1->SetNumberOfSides(30);
    tube1->SetInputConnection(line1->GetOutputPort());

    auto tube2 = vtkSmartPointer<vtkTubeFilter>::New();
    tube2->SetRadius(3);
    tube2->SetNumberOfSides(30);
    tube2->SetInputConnection(line2->GetOutputPort());

    auto tube3 = vtkSmartPointer<vtkTubeFilter>::New();
    tube3->SetRadius(3);
    tube3->SetNumberOfSides(30);
    tube3->SetInputConnection(line3->GetOutputPort());

    auto booleanFilter1 = vtkSmartPointer<vtkPolyDataBooleanFilter>::New();
    booleanFilter1->SetInputConnection(0,tube1->GetOutputPort());
    booleanFilter1->SetInputConnection(1, tube2->GetOutputPort());
    booleanFilter1->SetOperModeToUnion();

    auto booleanFilter2 = vtkSmartPointer<vtkPolyDataBooleanFilter>::New();
    booleanFilter2->SetInputConnection(0,booleanFilter1->GetOutputPort());
    booleanFilter2->SetInputConnection(1, tube3->GetOutputPort());
    booleanFilter2->SetOperModeToUnion();

    booleanFilter2->Update();

These three tubes clearly have a common intersection at the origin and do not overlap, but the program does not give the expected result. It output

tube_connect_test: /home/wzx/CLionProjects/tube_connect/vtkbool-2.5.2/vtkPolyDataBooleanFilter.cxx:1997: void vtkPolyDataBooleanFilter::MergePoints(vtkPolyData*, PolyStripsType&): Assertion `numPts > 0' failed.

The strange thing is When I remove the last digit of the decimal, It works

    array<double, 3> point1{0.00,10.12,100.00};
    array<double, 3> point2{-0.00,-10.128,100.00};

    array<double, 3> point3{10.12,-0.00,99.99};
    array<double, 3> point4{-10.12,-0.00,100.00};

    array<double, 3> point5{7.16,7.15,100.00};
    array<double, 3> point6{-7.15,-7.16,100.00};