Lines and curves rendered in a strange way

### Describe the error

Today I uninstalled my old manimgl installed from pypi and installed manimgl from master. Then I rendered my old video project. However, I got a unexpected effect. Every line seems to be faded in and faded out, includes sides of polygon, arrows, number lines. What's more, curves are sectionally faded out, which makes it looks like dashed... Not only my project but the examples did so.

### Code and Error
**Code**:

```python
# Hope my code is easy looking... I didn't write notes
def construct(self):
axes1 = Axes(x_range=(-1, 2), y_range=(0, 6), height=4.8, width=2.4)
axes1.to_edge(LEFT)
coord_a = axes1.c2p(2, math.sqrt(32))
coord_b = axes1.c2p(0, 0)
coord_c = axes1.c2p(2, 0)
coord_d = axes1.c2p(2, math.sqrt(2))
dot_a = Dot(coord_a, fill_color=BLUE_C)
dot_b = Dot(coord_b, fill_color=BLUE_C)
dot_c = Dot(coord_c, fill_color=BLUE_C)
dot_d = Dot(coord_d, fill_color=BLUE_C)
label_a = Text("A", slant=ITALIC, font_size=36)
label_b = Text("B", slant=ITALIC, font_size=36)
label_c = Text("C", slant=ITALIC, font_size=36)
label_d = Text("D", slant=ITALIC, font_size=36)
label_a.next_to(dot_a, UP)
label_b.next_to(dot_b, DOWN)
label_c.next_to(dot_c, DOWN)
label_d.next_to(dot_d, RIGHT)
triangle_abc = Polygon(coord_a, coord_b, coord_c)
triangle_abc.set_stroke(BLUE_C, width=4)
rectangle = Square(0.24)
rectangle.set_stroke(BLUE_C, width=2)
rectangle.set_fill(BLUE_C, opacity=0.25)
rectangle.move_to(axes1.c2p(1.85, 0.15))
segment_cd = Line(coord_c, coord_d, color=YELLOW_C)
segment_cd.set_opacity(0.5)
length_cd = Tex(r"\sqrt{2}", font_size=36)
length_cd.next_to(segment_cd)
geometry_graph = VGroup(triangle_abc, dot_a, dot_b, dot_c, dot_d,
label_a, label_b, label_c, label_d,
rectangle, length_cd)

axes2 = Axes(x_range=(0, 13, 2), y_range=(0, 20, 2), height=6, width=3.9,
axis_config={"stroke_width": 2, "include_tip": False})
# axes2.add_coordinate_labels(font_size=60)
axes2.to_edge(RIGHT) # .scale(0.3)
lable_position = axes2.c2p(10, 19.5)
function_graph = axes2.get_graph(lambda x: (x - 4) ** 2 + 2,
color=RED_C, x_range=[2, 8])

def graph_label(tex: str) -> Tex:
label = Tex(tex, font_size=32)
label.set_color(RED_C)
label.move_to(lable_position)
return label
func_label = graph_label('S=(t-4)^2+2')
func_label_mid = graph_label('S=a(t-4)^2+2')
func_label_orig = graph_label('S=a(t-h)^2+k')

self.wait()
self.play(FadeIn(geometry_graph, DOWN), Write(axes2), run_time=3)
self.wait(3)

self.play(ShowCreation(function_graph))
self.wait()
self.play(Write(func_label_orig))
self.wait()
self.play(ReplacementTransform(func_label_orig, func_label_mid))
self.wait()
self.play(ReplacementTransform(func_label_mid, func_label))
self.wait(3)
```

**Error**:

The final scene to be like this:

### Environment
**OS System**: Windows 11 22H2 22621.1265
**manim version**: master after pypi ver uninstalled
**python version**: Python 3.11.1
**Graph card**: HD4400