In IE, there is no request.responseURL
Had an issue today with users in Internet Explorer (all versions) due to a deficiency in the XHR object (Edge is fine).
We were handling a response and looking for
response.request.responseURL which is present in all other browsers but not IE.
The solution, because we had hold of the
response object, is to fallback to
const originalUrl = response.request.responseURL || response.config.url
Not so easy if you only have the request, unfortunately.
Stay safe - have hope 🌿