Page repeatedly refreshes even when ?reload=false is specified

[RalphORama]

I'm attempting to integrate Webpack with KeystoneJS for a CMS I'm building. Currently, Webpack properly compiles & serves my React front end, but causes repeated reloading when trying to access the Keystone backend. This is caused by webpack-hot-middleware running into an error (see below) and auto-refreshing the page.

I believe this error is caused by my use of webpack-hot-middleware, as the hot-reloading functionality is what's causing the issue.

Ideally, I'd like to make it so react-hot-middleware ignores everything under localhost:3000/admin

• Operating System: macOS 10.13.6
• Node Version: 13.0.1
• NPM Version: 6.12.0
• webpack Version: 4.41.2
• ${package} Version: 2.25.0

Errors

Server: none

Client (Chrome 78.0.3904.108 (Official Build) (64-bit)):

[HMR] connected
[HMR] Checking for updates on the server...
 GET http://localhost:3000/admin/a91a1112f99fda33112c.hot-update.json 404 (Not Found)
[HMR] Cannot find update (Full reload needed)
[HMR] (Probably because of restarting the server)
[HMR] Reloading page

Code

• webpack.config.js: https://pastebin.com/Kmfj2XEG
• See the repo

How Do We Reproduce?

1. Clone the repo
2. yarn install
3. npm run dev
4. Visit http://localhost:3000/admin in browser