signals in unmount hook are breaking partial navigation silently

[darkship]

Hello,
When I navigate between 2 pages using partials, if there is an unmount hook in an island it will break the app until you reload.

Unmount hook (see Counter.tsx)

    useEffect(()=>{
        return ()=> {
            console.log(props.count.value)
        }
    },[])

Repo: https://github.com/darkship/fresh-bug-signal-unmount

signal_bug_unmount-2024-12-26_19.45.29.mp4

[MrDwarf7]

This seems quite similar to what I've reported over on #2797 as well - I noticed it first on the webiste and this seems quite similar.
Was having a look through the library code and I'm able to pinpoint it but not sure how to resolve.