TracedPath disappears when adding other objects

Nobody has claimed this yet.

## Description of bug / unexpected behavior
TracedPath mobjects disappear as soon as other objects are added to the scene.

## Expected behavior
I would have expected that they stay visible like other objects (for example like the circle in the example code).

## How to reproduce the issue
With the code below, the path is visible at the end. However, if you add the line that is commented out, the traced path will vanish.

Code for reproducing the problem

```py
from manim import *

r = 1.5

class Test(Scene):
def construct(self):
c = Circle(radius = r).shift(-r*PI*RIGHT)
dot_pt = lambda t: c.point_at_angle(3*PI/2-2*t*PI)
d = Dot(dot_pt(0))
traced = TracedPath(d.get_center)
e = Dot(ORIGIN)

self.add(c,d,traced)
self.play(
c.animate.shift(2*r*PI*RIGHT),
UpdateFromAlphaFunc(d,lambda mo,t: mo.move_to(dot_pt(t))),
run_time=5
)
#self.add(e)
self.wait()

```

## System specifications

System Details

- OS: Windows 10 Pro 22H2 19045.5011
- RAM: 16 GB
- Python version: 3.12.7
- Installed modules:
```
Package Version
------------------------ -----------
annotated-types 0.7.0
asttokens 2.4.1
av 13.1.0
beautifulsoup4 4.12.3
cachetools 5.5.0
certifi 2024.8.30
charset-normalizer 3.4.0
click 8.1.7
click-default-group 1.2.4
cloup 3.0.5
colorama 0.4.6
colour 0.1.5
contourpy 1.3.0
cycler 0.12.1
decorator 5.1.1
distlib 0.3.9
executing 2.1.0
filelock 3.16.1
fonttools 4.54.1
glcontext 3.0.0
google-api-core 2.21.0
google-api-python-client 2.149.0
google-auth 2.35.0
google-auth-httplib2 0.2.0
googleapis-common-protos 1.65.0
httplib2 0.22.0
idna 3.10
ipython 8.28.0
isosurfaces 0.1.2
jedi 0.19.1
Jinja2 3.1.4
kiwisolver 1.4.7
lxml 5.3.0
manim 0.18.1
manim-slides 5.1.8
ManimPango 0.6.0
mapbox_earcut 1.0.2
markdown-it-py 3.0.0
MarkupSafe 3.0.1
matplotlib 3.9.2
matplotlib-inline 0.1.7
mdurl 0.1.2
moderngl 5.11.1
moderngl-window 2.4.6
mpmath 1.3.0
multipledispatch 1.0.0
networkx 3.4.1
numpy 1.26.4
oauth2client 4.1.3
packaging 24.1
parso 0.8.4
pillow 10.4.0
pip 24.2
platformdirs 4.3.6
prompt_toolkit 3.0.48
proto-plus 1.24.0
protobuf 5.28.2
pure_eval 0.2.3
pyasn1 0.6.1
pyasn1_modules 0.4.1
pycairo 1.27.0
pydantic 2.9.2
pydantic_core 2.23.4
pydantic-extra-types 2.9.0
pydub 0.25.1
pyglet 2.0.18
Pygments 2.18.0
PyOpenGL 3.1.7
pyparsing 3.2.0
pyperclip 1.9.0
pyrr 0.10.3
PySide6 6.8.0
PySide6_Addons 6.8.0
PySide6_Essentials 6.8.0
python-dateutil 2.9.0.post0
python-pptx 1.0.2
PyYAML 6.0.2
QtPy 2.4.1
requests 2.32.3
rich 13.9.2
rsa 4.9
rtoml 0.11.0
scipy 1.14.1
screeninfo 0.8.1
setuptools 75.1.0
shiboken6 6.8.0
six 1.16.0
skia-pathops 0.8.0.post1
soupsieve 2.6
srt 3.5.3
stack-data 0.6.3
svgelements 1.9.6
sympy 1.13.3
tqdm 4.66.5
traitlets 5.14.3
typing_extensions 4.12.2
uritemplate 4.1.1
urllib3 2.2.3
validators 0.34.0
virtualenv 20.26.6
watchdog 5.0.3
wcwidth 0.2.13
XlsxWriter 3.2.0
```

Start by running the provided Test scene with and without self.add(e) to confirm when TracedPath disappears. Then trace how TracedPath, Scene.add, and the animation update interact; done means the path remains visible after adding another object and the reproduction behaves as expected.

Written by the indexing model from the issue text.