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Describe the bug

Preact unnecessarily removes and adds the DOM nodes that it finds after HTML comments during hydration.

<div id="root">
    <div>I'm going to be preserved in the DOM</div>
    <!-- I'm a comment, so I'll be removed, which is also fine -->
    <div>I'll be removed and added back again</div>
</div>

To Reproduce

I reproduced the bug in this repository: https://github.com/luisherranz/preact-comments-hydration-bug (Open with Stackblitz Codeflow)

And this is a branch with a Mutation Observer added to the current hydration tests.

Steps to reproduce the behavior:

1. Add a comment to the SSR'ed HTML
2. Monitor changes to the DOM
3. Hydrate it with Preact
4. The nodes after the HTML comment are removed and added again

There is a video with a longer explanation on this other issue.

Expected behavior

Preact should remove the comments, but it should preserve the rest of the DOM nodes.