.png image visual corruption over 1mb

## Issue
Certain images that I am trying to manipulate in node-canvas visually corrupt when loaded. It looks psychedelic.
I've downloaded hundreds of these images from discord and only those that are **.pngs** and **over 1 mb** do this, and they all do it.
If I copy the image and save it to a new file, the issue doesn't occur in the new image.
I've done a few tests but I am too amateur to figure out where the issue is coming from.
Here is the image and resulting mess in question:

## Steps to Reproduce
```js
const imgCanv = Canvas.createCanvas(1284,2778); //the size doesn't matter, it breaks no matter what
const ctx = imgCanv.getContext("2d");
const img = Canvas.loadImage("image.png");
img.then((img) => {
ctx.drawImage(img,0,0);
write(imgCanv); // or some other function to do something with it
}
```
Save the image above as image.png, load it, and write it again.

(If someone could actually try this to see if it is just a me issue, that would be greatly appreciated)
## Your Environment
* Version of node-canvas: canvas@2.7.0
* Environment: node.js v14.16.0

(apologies if this is a known issue or obvious. I've tried looking and can't find any mention of something like this.)