V0.18.1 NumberLine's number_to_point() is broken when using `add_tip` about manim HOT 6 OPEN

class nlineScaling(Scene):
    def construct(self):
        nline1 = NumberLine(
            x_range=[0,10,1],
            length=8,
            font_size=16,
            label_direction=UP,
        ).add_numbers().to_corner(UL)
        dot1 = Dot(nline1.n2p(5),color=RED)
        self.add(nline1, dot1)

        nline2 = nline1.copy().scale(1.5).next_to(nline1,DOWN,aligned_edge=LEFT)
        dot2 = Dot(nline2.n2p(5),color=BLUE)
        self.add(nline2,dot2)

        nline3 = nline2.copy().next_to(nline2,DOWN,aligned_edge=LEFT)
        nline3.add_tip()
        dot3 = Dot(nline3.n2p(5),color=YELLOW)
        self.add(nline3,dot3)

        nline4 = NumberLine(
            x_range=[0,10,1],
            length=12,
            font_size=16,
            label_direction=UP,
            include_tip=True,
        ).add_numbers().next_to(nline3,DOWN,aligned_edge=LEFT)
        dot4 = Dot(nline4.n2p(5),color=TEAL)
        self.add(nline4,dot4)

        nline5 = NumberLine(
            x_range=[0,10.5,1],
            length=12.5,
            font_size=16,
            label_direction=UP,
            include_tip=True,
        ).add_numbers().next_to(nline4,DOWN,aligned_edge=LEFT)
        dot5 = Dot(nline5.n2p(5),color=ORANGE)
        self.add(nline5,dot5)

        nline6 = nline5.copy().scale(0.7).next_to(nline5,DOWN,aligned_edge=LEFT)
        dot6 = Dot(nline6.n2p(5),color=GREEN)
        self.add(nline6,dot6)

class nlineScaling(Scene):
    def construct(self):
        # add_tip by itself
        nline1 = NumberLine(
            x_range=[0,10,1],
            length=8,
            font_size=16,
            label_direction=UP,
        ).add_numbers().to_corner(UL)
        nline1.add_tip()
        dot = Dot(nline1.n2p(5), color=YELLOW)
        self.add(nline1, dot)

        # add_tip, followed by resetting the ticks
        nline2 = NumberLine(
            x_range=[0,10,1],
            length=8,
            font_size=16,
            label_direction=UP,
        ).add_numbers().next_to(nline1,DOWN,aligned_edge=LEFT)
        nline2.add_tip()
        nline2.remove(nline2.ticks).remove(nline2.numbers)
        nline2.add_ticks()
        nline2.add_numbers()
        dot2 = Dot(nline2.n2p(5), color=RED)
        self.add(nline2, dot2)

        # Adding the tip from the beginning
        nline3 = NumberLine(
            x_range=[0,10,1],
            length=8,
            font_size=16,
            label_direction=UP,
            include_tip=True,
        ).add_numbers().next_to(nline2,DOWN,aligned_edge=LEFT)
        dot3 = Dot(nline3.n2p(5), color=GREEN)
        self.add(nline3, dot3)

def get_end(self) -> Point3D:
    if self.has_tip():
        return self.tip.get_end()
    else:
        return super().get_end()

def get_end(self) -> Point3D:
    if self.has_tip():
        return self.tip.base
    else:
        return super().get_end()