🐛 BUG:Wrangler throws `Error: The script will never generate a response.`

### Which Cloudflare product(s) does this pertain to?

Wrangler

### What versions are you using?

4.5.0

### What operating system and version are you using?

Mac 15.2 (24C101)

### Please provide a link to a minimal reproduction

https://github.com/ckvv/server-hono

### Describe the Bug

Every other request to `http://localhost:8787` throws an exception,

```
Error: The script will never generate a response.
at async Object.fetch (file:///Users/chenkai/github/ckvv/template/server-hono/node_modules/.pnpm/miniflare@4.20250321.0/node_modules/miniflare/dist/src/workers/core/entry.worker.js:1002:22)
```
Steps to reproduce

+ `pnpm install`
+ Add environment variable file to the root directory `.dev.vars`
```
DATABASE_URL=postgresql://username:password@host:port/test
```
+ `pnpm run dev`

### Please provide any relevant error logs

_No response_