Weird artifacts / glitches for `renderer=opengl`

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## Description of bug / unexpected behavior

When working with `renderer=opengl` I often get some weird artifacts in the video. The example below is just some easy example, it gets worse for complex examples. They come in black lines/boxes. Here are three screenshots from a video:


## Expected behavior

Well, I wouldn't expect those glitches.

## How to reproduce the issue

Run with

`manim -qh --renderer=opengl --write_to_movie opengl.py Test`

```py
class Test(Scene):
def construct(self):
frame = self.renderer.camera
frame.set_euler_angles(
phi=75 * DEGREES,
)

sphere = OpenGLSphere(
radius=1,
resolution=(101, 101)
).shift(OUT)
torus = OpenGLTorus(r1=1, r2=1)
torus2 = OpenGLTorus(r1=3, r2=1).shift(IN)

s_mesh = OpenGLSurfaceMesh(
sphere
)
t_mesh = OpenGLSurfaceMesh(
torus
)
t2_mesh = OpenGLSurfaceMesh(
torus2
)

self.play(
Create(s_mesh),
FadeIn(sphere),
Create(t2_mesh),
FadeIn(torus2)
)
self.wait()

self.play(
sphere.animate.shift(IN*2),
s_mesh.animate.shift(IN*2)
)
self.wait()

self.play(
ReplacementTransform(s_mesh, t2_mesh),
ReplacementTransform(sphere, torus2)
)
self.wait()

self.play(
ReplacementTransform(t2_mesh, t_mesh),
ReplacementTransform(torus2, torus)
)
self.wait()
```

## Additional media files

https://user-images.githubusercontent.com/44864613/124495576-921c9600-ddb8-11eb-8b8c-2050b318e32a.mp4

https://user-images.githubusercontent.com/44864613/124496699-102d6c80-ddba-11eb-9525-d2dd0a91b410.mp4

## Logs
Terminal output

```
PASTE HERE OR PROVIDE LINK TO https://pastebin.com/ OR SIMILAR
```

## System specifications

- OS: macOS Big Sur 11.4
- RAM: 8GB
- Graphics Card: Intel Iris Plus Graphics 655 1536 MB
- Python version: 3.9.6

Start by running the supplied `manim -qh --renderer=opengl --write_to_movie opengl.py Test` command with the example in `opengl.py`, then compare the rendered video with the screenshots and media. Trace the OpenGL rendering path involved in the reproduced artifacts; the issue is resolved when the black lines and boxes no longer appear in the output.

Written by the indexing model from the issue text.