Hot reload not working in Windows (Chrome)

I have got hot reloading to work fine on my Mac, I think (although it seems I still need to refresh the page?).

But on my Windows it doesn't even work after I reload it.

On my Mac in the DevTools console I noticed these 2 lines:

[HMR] Waiting for update signal from WDS...
[WDS] Hot Module Replacement enabled.

Which doesn't appear on my Windows, so I suspect there's a problem about there?

Running npm run hot just tells me it's set up fine.

I'm using Windows 10 and Chrome 65 or something (newest)