Loader doesn't disappear when adding Product in Microsoft Edge

[coatesjonathan]

The loading GIF doesn't disappear when you go to Products > Catalog > Add Product

This happens only when using the Microsoft Edge Browser, there doesn't seem to be any Errors appearing in console.

Preconditions

1. Magento 2.1.5
2. PHP 7

Steps to reproduce

1. Log in to Magento 2 Backend on Microsoft Edge
2. Go to Products > Catalog
3. Press "Add Product" in the Top Right

Expected result

1. You should be able to add a new Product