Receiving error on android (com.facebook.react.bridge.ReadableNativeMap cannot be cast to java.lang.Strin)

I am currently working on a new cryptocurrency / chat mobile app using matrix sdk (https://github.com/matrix-org/matrix-js-sdk), and this fails for me on android, I receive the `com.facebook.react.bridge.ReadableNativeMap cannot be cast to java.lang.String` error.

- Also I'm not too sure if this works on iOS with matrix SDK, since I don't need the polyfills on iOS, I only need the polyfills on android

#### How to reproduce
- make browser-pollyfill a dependancy, and import it into your project
- start your project, and within a few seconds - minutes, an error will appear
- Device: Moto G5
- Operating system: Android 🤦‍♂️

#### Current Solution
Right now I have a file called `polyfill.js` and I import it only for android within App.js - contents of this file were taken from `Node.js` file in this library, credit goes to @EvanBacon

```
import { EventEmitter } from 'fbemitter';

class Document {
constructor() {
this.emitter = new EventEmitter();
this.addEventListener = this.addEventListener.bind(this);
this.removeEventListener = this.removeEventListener.bind(this);
this._checkEmitter = this._checkEmitter.bind(this);
}

createElement(tagName) {
return {};
}

_checkEmitter() {
if (
!this.emitter ||
!(this.emitter.on || this.emitter.addEventListener || this.emitter.addListener)
) {
this.emitter = new EventEmitter();
}
}

addEventListener(eventName, listener) {
this._checkEmitter();
if (this.emitter.on) {
this.emitter.on(eventName, listener);
} else if (this.emitter.addEventListener) {
this.emitter.addEventListener(eventName, listener);
} else if (this.emitter.addListener) {
this.emitter.addListener(eventName, listener);
}
}

removeEventListener(eventName, listener) {
this._checkEmitter();
if (this.emitter.off) {
this.emitter.off(eventName, listener);
} else if (this.emitter.removeEventListener) {
this.emitter.removeEventListener(eventName, listener);
} else if (this.emitter.removeListener) {
this.emitter.removeListener(eventName, listener);
}
}
}

window.document = window.document || new Document();
```