Background is flashing white on main branch

## Bevy version
- Main Branch: https://github.com/bevyengine/bevy/commit/fb124c35beb96c7374764aa51517a12a3183c992
- Macbook Pro M1 chip WASM Target
```
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
```

I noticed recently the background bevy canvas space is a dark black color instead of the usual dark grey. This coincided with the background also now flashes sometimes randomly.

- Video Clip from my twitch stream:
https://clips.twitch.tv/CautiousSnappyYamUnSane--73AoZr5TaYdgtJN

Edit:
- Example code: https://github.com/miketwenty1/wonder12/tree/fix-flash
- Happening on Brave Browser