AnimationGroup height visual issue

I am trying to create a cool effect where the text is getting written and zoom in at the same time.
I tried to use the `AnimationGroup` object for that but this is how it renders :

https://user-images.githubusercontent.com/2827383/115975871-e9a4b700-a568-11eb-8194-fed4927fcfd2.mp4

First, the letters appear really distant from each other, small and also the height animation is being cut off, the letters come back to the original size.

The code is very simple :

```python
class KoreanWord(Scene):
def construct(self):
t = Text('실망')
group = []
group.append(Write(t))
group.append(t.animate.set_height(2))

self.play(AnimationGroup(*group, run_time=10))
```

Am I doing something wrong, or is it an issue?

Thanks in advance for your help.

The issue is in the AnimationGroup behavior when combining Write and scaling animations. Look at the AnimationGroup class in manim/animation/composition.py and the Write animation in manim/animation/creation.py. Test the provided code snippet to reproduce the visual bug, then examine how AnimationGroup handles concurrent animations affecting the same object's properties.

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