Code sections removed when formatting file with syntax errors

[BernieSumption]

Given the following invalid code (invalid because an {:else} block comes before a {:else if} block):

{#if condition === 0}
  A
{:else}
  REMOVED
{:else if condition === 1}
  ELIF
{/if}

Running prettier with prettier-plugin-svelte enabled on this file removes the section marked REMOVED.

This can lead to code being deleted if a file is saved and auto-formatted mid-way through refactoring.

I would expect that formatting a Svelte file with syntax errors had no effect, which is the behaviour for JavaScript.