HTMX 4 hx-sse:connect gets stuck while trying to reconnect when server is down

I'm using HTMX 4.0.0 and hx-sse, I'm testing the "persistent connections".

The reconnect works. But only if the backend server is turned on. If I shut down the back-end server, the hx-sse tries to reconnect and gets stuck in a pending state. I started the back-end server, but the hx-sse did nothing. Is there a timeout option to cancel the request and try again...? I suspect that it gets stuck because there is no timeout on creating a connection.

Tried Firefox and Chromium. Backend server was on my local computer.

I did everything per documentation, also tried configuration settings.

```html

test

```

Start with the hx-sse extension's reconnect handling and reproduce the issue using the provided HTML with htmx 4.0.0, stopping and restarting the local backend serving /events. Trace why the connection remains pending, then verify that reconnecting resumes after the server returns and that existing reconnect settings still work.

Written by the indexing model from the issue text.