HTML comment is duplicated when using Format on Save

[ejoflo]

When enabling "Format on Save" in VS Code settings, recently I've noticed that some comments are being duplicated on save. Here are two images:

Before:

After:

I didn't have this issue before and I can only prevent it by disabling "Format on Save" or unchecking "Format: Enable" in Settings under Extensions > Svelte.

[dummdidumm]

Can you post a minimum reproducible and copy-pasteable code snippet?

[ejoflo]

If you save the following as a .svelte file and try to save it with "Format on Save" the same behavior as above should happen with the "Full image viewer" html comment. It will be duplicated on save.

<script>
</script>

<!-- Full image viewer -->
<FullImage on:close="{() => showFullImage()}" images="{tip.imgUrls}" size="{pageWidth > 1024 ? 'large' : 'medium'}" />

<div class="report-button" in:fade="{{ delay: 300, duration: 650 }}">
<Report id="{tip._id}" />
</div>

<style>
</style>

[dummdidumm]

This was released in the VS Code extension version 104.4.2

[xuelink]

"prettier": "^2.8.0",
"prettier-plugin-svelte": "^2.10.1",

prettier.mp4

[icjosh10]

"prettier": "^2.8.0",
"prettier-plugin-svelte": "^2.10.1",

prettier.mp4

I'm experiencing the exact same thing