svelte-language-server thinks it's error to use store value as array index

[egormalyutin]

Describe the bug
I have a component like this:

<script lang="ts">
  import Bar from "./Bar.svelte";
  import { writable } from "svelte/store";

  const currentTab = writable(0);
  const barIcons = ["telescope", "results", "results"];

  import Inputs from "./Inputs.svelte";
  const tabs = [Inputs];
</script>

<main>
  <Bar bind:current={$currentTab} icons={barIcons} />
  <svelte:component this={tabs[$currentTab]} />
</main>

svelte-language-server detects a TypeScript error in <svelte:component this={tabs[$currentTab]} />:

Cannot find name '$currentTab'. Did you mean 'currentTab'?

Although it compiles without any errors or warnings.

What's interesting, if I add "+ 0" or even "+" near $currentTab, svelte-language-server will detect no error.

  <svelte:component this={tabs[+$currentTab]} />

Expected behavior
No errors must be detected.

System (please complete the following information):

• OS: Arch Linux
• IDE: nvim with coc-svelte