wait() messes with DecimalNumber position in updater

[Paul-Roux-Phys]

Description of bug / unexpected behavior

In the tutorial Manim's building blocks, section Animations subsection Creating a custom animation, in the scene CountingScene, the updater which is supposed to center the number doesn't work (see the animation rendered on the page).

Expected behavior

The updater (lambda number: number.move_to(ORIGIN)) does not work until the play() animation is finished. Weirdly enough, removing the first self.wait() solves the problem.

How to reproduce the issue

Code for reproducing the problem, copy pasted from the tutorial page

```py from manim import * class Count(Animation): def __init__(self, number: DecimalNumber, start: float, end: float, **kwargs) -> None: # Pass number as the mobject of the animation super().__init__(number, **kwargs) # Set start and end self.start = start self.end = end def interpolate_mobject(self, alpha: float) -> None: # Set value of DecimalNumber according to alpha value = self.start + (alpha * (self.end - self.start)) self.mobject.set_value(value) class CountingScene(Scene): def construct(self): # Create Decimal Number and add it to scene number = DecimalNumber().set_color(WHITE).scale(5) # Add an updater to keep the DecimalNumber centered as its value changes number.add_updater(lambda number: number.move_to(ORIGIN)) self.add(number) self.wait() # Play the Count Animation to count from 0 to 100 in 4 seconds self.play(Count(number, 0, 100), run_time=4, rate_func=linear) self.wait() ```

Additional media files

MP4 file

After removing the first self.wait(): https://github.com/user-attachments/assets/1f9eed72-32b6-48f6-90ee-5070c7b94519

[Jackyuanx]

Hello, we've tried to reproduce the problem but could not successfully find any differences between having wait() and not, would you be able to clarify the issue?