It looks like you're using the Manim Community version, so you may want to raise the issue there. This repo is the 3b1b version.
I tried you're scene on this version and it seemed to work fine, ...
### Describe the error
When I animate `Tex` object, it doesn't get affected.
### Code and Error
**Code**:
```py
from manim import *
class displayEquations(Scene):
def construct(self)...
## What's Changed
* Performance improvements in rendering
* Improvements to interactive scene development
* Improved stroke rendering in 3d
* Refactor StringMobject and relevant classes by @Yis...