[Bug]: HMR events lead to new WS connections for Storybook's Channel

[valentinpalkovic]

Describe the bug

A file change usually triggers a reload event in Storybook's manager. As soon as this happens, Storybook's manager establishes a new WebSocket connection to the backend.

Reproduction steps

1. Start Storybook
2. Make a change in a story file or component file
3. Take a look at the network tab. Filter for WS. You can see that a new WS connection has been established

Additional context

No response