Foreground objects are not removing

[Gedicht2von101]

At the end of the animation, the foreground objects are removed but reappear when the label appears. How to fix it?

class Lemma_two(Scene):

    def construct(self):

        Line.set_default(stroke_width=2.5)
        Angle.set_default(stroke_width=2.5)
        
        title = Tex(r"\begin{minipage}{7cm} Given:\\ $\triangle$ $ABC$; $AA_1$, $BB_1$ are bisectors; $D \in A_1B_1$; $a \perp AB$, $b \perp BC$, $c \perp AC$.\\ To proof:\\ $a+b=c$. \end{minipage}", font_size=20).next_to([1.5,0,0])
        
        dotA = Dot([-6,-1.01,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dotB = Dot([4-6,-1.01,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dotC = Dot([4.4406-6,2.0366-1.01,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dotD = Dot([5.36078-6,0.533-1.01,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dotA1 = Dot([4.19835-6,0.91685-1.01,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dotB1 = Dot([2.91961-6,1.33902-1.01,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dotC1 = Dot([6.97545-6,-1.01.set_default(stroke_width=2.5)
        Angle.set_default(stroke_width=2.5)
        
        title = Tex(r"\begin{minipage}{7cm} Given:\\ $\triangle$ $ABC$; $AA_1$, $BB_1$ are bisectors; $D \in A_1B_1$; $a \perp AB$, $b \perp BC$, $c \perp AC$.\\ To proof:\\ $a+b=c$. \end{minipage}", font_size=20).next_to([1.5,0,0])
        ,0], .03, stroke_width=0.5).set_fill(WHITE).set_stroke(BLACK).set_stroke_opacity(0.5)
        dota = Dot([5.36078-6,-1.01,0])
        dotb = Dot([4.171-6,0.79042-1.01,0])
        dotc = Dot([4.6311-6,2.12396-1.01,0])
        dotd1 = Dot([3.81614-6,1.7502-1.01,0])
        dotd2 = Dot([4.19836-6,-1.01,0])
        dote1 = Dot([5.76284-6,2.64302-1.01,0])
        dote2 = Dot([4.13302-6,0.61488-1.01,0])
        dotPhantom = Dot([5.87116-6,2.6927-1.01,0])

        lineA = Line(dotB.get_center(), dotC.get_center()).set_color(BLUE)
        lineB = Line(dotC.get_center(), dotA.get_center()).set_color(BLUE)
        lineC = Line(dotA.get_center(), dotB.get_center()).set_color(BLUE)
        lineA1 = Line(dotA.get_center(), dotA1.get_center()).set_color(BLUE)
        lineB1 = Line(dotB.get_center(), dotB1.get_center()).set_color(BLUE)

        dlineA = DashedLine(dotB.get_center(), dotC1.get_center(), dash_length=0.2).set_color(BLUE)
        dlineB = DashedLine(dotB1.get_center(), dotD.get_center(), dash_length=0.2).set_color(BLUE)
        dlineC = DashedLine(dotC.get_center(), dotPhantom.get_center(), dash_length=0.2).set_color(BLUE)
        dlineB1 = DashedLine(dotD.get_center(), dotC1.get_center(), dash_length=0.2).set_color(BLUE)
        dlinea = DashedLine(dotD.get_center(), dota.get_center(), dash_length=0.15, dashed_ratio=0.75).set_color(BLUE)
        dlineb = DashedLine(dotD.get_center(), dotb.get_center(), dash_length=0.15, dashed_ratio=0.5).set_color(BLUE)
        dlinec = DashedLine(dotD.get_center(), dotc.get_center(), dash_length=0.15, dashed_ratio=0.5).set_color(BLUE)
        dlined1 = DashedLine(dotA1.get_center(), dotd1.get_center(), dash_length=0.15, dashed_ratio=0.5).set_color(BLUE)
        dlined2 = DashedLine(dotA1.get_center(), dotd2.get_center(), dash_length=0.15, dashed_ratio=0.5).set_color(BLUE)
        dlinee1 = DashedLine(dotC1.get_center(), dote1.get_center(), dash_length=0.15, dashed_ratio=0.5).set_color(BLUE)
        dlinee2 = DashedLine(dotC1.get_center(), dote2.get_center(), dash_length=0.15, dashed_ratio=0.5).set_color(BLUE)
        
        Atext = MathTex("A", font_size=20).next_to(dotA, (0.5)*DOWN).set_color(YELLOW)
        Btext = MathTex("B", font_size=20).next_to(dotB, (0.5)*DOWN).set_color(YELLOW)
        Ctext = MathTex("C", font_size=20).next_to(dotC, (0.5)*UP).set_color(YELLOW)
        A1text = MathTex("A_1", font_size=20).next_to(dotA1, (0.25)*RIGHT + (0.05)*UP).set_color(YELLOW)
        B1text = MathTex("B_1", font_size=20).next_to(dotB1, (0.5)*UP).set_color(YELLOW)
        C1text = MathTex("C_1", font_size=20).next_to(dotC1, (0.5)*DOWN).set_color(YELLOW)
        Dtext = MathTex("D", font_size=20).move_to(dotD.get_center() + (0.15)*UP + (0.15)*RIGHT).set_color(YELLOW)
        atext = MathTex("a", font_size=18).move_to(dlinea.get_center() + (.1)*LEFT).set_color(YELLOW)
        btext = MathTex("b", font_size=18).move_to(dlineb.get_center() + (.1)*DOWN).set_color(YELLOW)
        ctext = MathTex("c", font_size=18).move_to(dlinec.get_center() + (0.1)*RIGHT + (0.05)*UP).set_color(YELLOW)
        d1text = MathTex("d", font_size=18).move_to(dlined1.get_center() + (0.1)*RIGHT + (0.05)*UP).set_color(YELLOW)
        d2text = MathTex("d", font_size=18).move_to(dlined2.get_center() + (0.15)*RIGHT).set_color(YELLOW)
        e1text = MathTex("e", font_size=18).move_to(dlinee1.get_center() + (0.1)*RIGHT + (0.05)*UP).set_color(YELLOW)
        e2text = MathTex("e", font_size=18).move_to(dlinee2.get_center() + (0.1)*UP).set_color(YELLOW)

        angA_1 = Angle(lineC, lineA1, .5, (1,1), color=BLUE)
        angA_2 = Angle(lineA1, lineB, .6, (1,-1), color=BLUE)
        angB_1 = VGroup(Angle(lineA, lineB1, .2, (1,1), color=BLUE), Angle(lineA, lineB1, .3, (1,1), color=BLUE))
        angB_2 = VGroup(Angle(lineB1, lineC, .25, (1,-1), color=BLUE), Angle(lineB1, lineC, .35, (1,-1), color=BLUE))

        anga = RightAngle(dlineA, dlinea, .15, quadrant=(1,-1), color=BLUE)
        angb = RightAngle(lineA, dlineb, .15, quadrant=(-1,-1), color=BLUE)
        angc = RightAngle(dlineC, dlinec, .15, quadrant=(1,-1), color=BLUE)
        angd1 = RightAngle(lineB, dlined1, .15, quadrant=(1,-1), color=BLUE)
        angd2 = RightAngle(dlineA, dlined2, .15, quadrant=(1,-1), color=BLUE)
        ange1 = RightAngle(dlineC, dlinee1, .15, quadrant=(-1,-1), color=BLUE)
        ange2 = RightAngle(lineA, dlinee2, .15, quadrant=(-1,-1), color=BLUE)
        
        self.add_foreground_mobjects(dotA, dotB, dotC, dotA1, dotB1, dotD)

        self.play(AnimationGroup(AnimationGroup(Write(dotA), Write(Atext), lag_ratio=0.5), Write(lineC),
                                 AnimationGroup(Write(dotB), Write(Btext), lag_ratio=0.5), Write(lineA),
                                 AnimationGroup(Write(dotC), Write(Ctext), lag_ratio=0.5), Write(lineB),
                                 AnimationGroup(Write(lineA1), Write(angA_1), Write(angA_2), lag_ratio=0.5),
                                 AnimationGroup(Write(dotA1), Write(A1text), lag_ratio=0.5),
                                 AnimationGroup(Write(lineB1), Write(angB_1), Write(angB_2), lag_ratio=0.5),
                                 AnimationGroup(Write(dotB1), Write(B1text), lag_ratio=0.5),
                                 AnimationGroup(Write(title), AnimationGroup(Write(dlineB), Write(dlineA), Write(dlineC), lag_ratio=0), Write(dotD), Write(Dtext), lag_ratio=0.5),
                                 AnimationGroup(Write(dlinea), Write(atext), Write(anga), lag_ratio=0.5), AnimationGroup(Write(dlineb), Write(btext), Write(angb), lag_ratio=0.5),
                                 AnimationGroup(Write(dlinec), Write(ctext), Write(angc), lag_ratio=0.5), lag_ratio=0.95, run_time=17))
        self.wait(5)

        proof = Tex("\\begin{minipage}{8cm} Proof:\\\ by the first lemma, the distance from point $C_1$ to the lines $BC$ and $AC$ are equal $\\left( e \\right)$; \\end{minipage}",
                    "\\\ \\begin{minipage}{8cm} let $A_1B_1=x$, $A_1D=y$ and $C_1D=z$; \\\ from the similarity of triangles: \\\ $$\\frac{c}{d}=\\frac{x+y}{x},\\quad \\frac{c}{e}=\\dfrac{x+y}{x+y+z},$$ \\\ $$\\frac{a}{d}=\\frac{z}{y+z},\\quad \\frac{b}{e}=\\dfrac{y}{y+z} \\Rightarrow$$ \\begin{multline*} \\frac{a}{c} + \\frac{b}{c} = \\\ = \\frac{xz}{(x+y)(y+z)} + \\frac{y(y+x+z)}{(x+y)(y+z)}= \\\ = 1 \\Rightarrow \\end{multline*} $$a+b=c.$$ \\end{minipage}", font_size=20).move_to([4,0,0])

        self.play(Transform(title, proof[0]))

        self.add_foreground_mobject(dotC1)

        self.play(AnimationGroup(Write(dlineB1), AnimationGroup(Write(dotC1), Write(C1text), lag_ratio=0.5),
                                 AnimationGroup(AnimationGroup(Write(dlinee1), Write(e1text), lag_ratio=0.5), Write(ange1),
                                                AnimationGroup(Write(dlinee2), Write(e2text), lag_ratio=0.5), Write(ange2), lag_ratio=0, run_time=2),
                                 lag_ratio=0.95, run_time=7))
        self.play(AnimationGroup(AnimationGroup(AnimationGroup(Write(dlined1), Write(d1text), lag_ratio=0.5), Write(angd1),
                                                AnimationGroup(Write(dlined2), Write(d2text), lag_ratio=0.5), Write(angd2), lag_ratio=0, run_time=1),
                                 Write(proof[1]), lag_ratio=0.95, run_time=12))
        self.wait(5)

        PROOF = VGroup(title, proof[1])
        GEOMETRY = VGroup(dotA, dotB, dotC, dotD, dotA1, dotB1, dotC1, Atext, Btext, Ctext, A1text, B1text, C1text, Dtext, atext, btext, ctext, d1text, d2text,
                          e1text, e2text, lineA, lineB, lineC, lineA1, lineB1, dlineA, dlineB, dlineC, dlineB1, dlinea, dlineb, dlinec, dlined1, dlined2, dlinee1,
                          dlinee2, angA_1, angA_2, angB_1, angB_2, anga, angb, angc, angd1, angd2, ange1, ange2)

        title2 = Tex(r"General problem", font_size=48)
        
        self.play(AnimationGroup(FadeOut(GEOMETRY, shift=DOWN), Transform(PROOF, title2), lag_ratio=0.5, run_time=2))
        
        self.remove_foreground_mobjects(dotA, dotB, dotC, dotA1, dotB1, dotD, dotC1)
        
        self.wait(1.5)
        self.play(FadeOut(PROOF, shift=DOWN),run_time=1.5)

Lemma_two.mp4

[Gedicht2von101]

I changed self.remove_foreground_mobjects to self.remove and problem was fixed.