FadeOut does not work in Succession

[Daedo]

Description of bug / unexpected behavior

I wanted to use a fading animation in a Succession. The idea was to have an object fade in, wait, and fade out again. However when running the animation, instead of fading in the object is present from the start, flashes and then fades out. Removing the FadeOut makes the FadeIn work correctly in the succession.
This appears to be an issue because the Succession adds all object of all animations to early.

Expected behavior

A succession of animations A, B, C should play exactly as if A, B, C would when played in sequence. In this case the object should only appear with the FadeIn

How to reproduce the issue

Code for reproducing the problem

class SuccessionBug(Scene):
    def construct(self):
        triangle = Triangle()

        self.play(
            Succession(
                Wait(1),
                FadeIn(triangle),
                Wait(1),
                FadeOut(triangle)
            )

Additional media files

Images/GIFs

System specifications

System Details

• OS (with version, e.g., Windows 10 v2004 or macOS 10.15 (Catalina)): Linux Mint 21.3
• Python version (python/py/python3 --version): 3.12.10
• Installed modules (provide output from pip list):

Package             Version
------------------- -----------
anyio               4.9.0
av                  13.1.0
backports.tarfile   1.2.0
beautifulsoup4      4.13.4
Brotli              1.1.0
build               1.2.2.post1
CacheControl        0.14.3
certifi             2025.4.26
cffi                1.17.1
charset-normalizer  3.4.2
cleo                2.1.0
click               8.2.0
cloup               3.0.7
colorama            0.4.6
crashtest           0.4.1
cryptography        45.0.2
decorator           5.2.1
distlib             0.3.9
dulwich             0.22.8
exceptiongroup      1.3.0
fastjsonschema      2.21.1
filelock            3.18.0
findpython          0.6.3
glcontext           3.0.0
h11                 0.16.0
h2                  4.2.0
hpack               4.1.0
httpcore            1.0.9
httpx               0.28.1
hyperframe          6.1.0
idna                3.10
importlib_metadata  8.6.1
importlib_resources 6.5.2
importmonkey        2.1.1
installer           0.7.0
isosurfaces         0.1.2
jaraco.classes      3.4.0
jaraco.context      6.0.1
jaraco.functools    4.1.0
jeepney             0.9.0
keyring             25.6.0
manim               0.19.0
ManimPango          0.6.0
mapbox_earcut       1.0.3
markdown-it-py      3.0.0
mdurl               0.1.2
moderngl            5.11.1
moderngl-window     3.1.1
more-itertools      10.7.0
msgpack             1.1.0
networkx            3.4.2
numpy               2.2.6
packaging           25.0
pbs-installer       2025.4.9
pillow              11.2.1
pip                 25.1.1
pkginfo             1.12.1.2
platformdirs        4.3.8
poetry              2.1.3
poetry-core         2.1.3
pycairo             1.28.0
pycparser           2.22
pydub               0.25.1
pyglet              2.1.6
pyglm               2.8.2
Pygments            2.19.1
pyproject_hooks     1.2.0
PySocks             1.7.1
PyYAML              6.0.2
RapidFuzz           3.13.0
requests            2.32.3
requests-toolbelt   1.0.0
rich                14.0.0
scipy               1.15.2
screeninfo          0.8.1
SecretStorage       3.3.3
setuptools          80.1.0
shellingham         1.5.4
skia-pathops        0.8.0.post2
sniffio             1.3.1
soupsieve           2.7
srt                 3.5.3
svgelements         1.9.6
tomli               2.2.1
tomlkit             0.13.2
tqdm                4.67.1
trove-classifiers   2025.5.9.12
typing_extensions   4.13.2
urllib3             2.4.0
virtualenv          20.31.2
watchdog            6.0.0
wheel               0.45.1
zipp                3.21.0
zstandard           0.23.0