Ohhh I remember this too, I hated how it consistently dropped connections. A community member fixed this for us (here https://github.com/cloudflare/wrangler/pul

Ohhh I remember this too, I hated how it consistently dropped connections. A community member fixed this for us (here https://github.com/cloudflare/wrangler/pull/2008 https://github.com/cloudflare/wrangler/pull/2008) so that it transparently and automatically reconnects now and the experience has gotten so much better. And of course, miniflare reduces even the chance of that to zero :)