Possible injection because of sanitize cache

Basically it's possible to inject dirty html:
```js
const striked = 'test';

console.log(

);
console.log();
console.log();
```

This is the output:
```html

```

Expected output:
```html

```

After rendering `

`, it caches `test` and doesn't sanitize it anymore. It can be seen live [here](https://codepen.io/remziatay/pen/YzroqLm?editors=1010) as well. Just because something was rendered before, it shouldn't mean that it's sanitized.