Errors with `Dropdown` with custom slots and Typescript

[Lucide]

I can't get the slotted Dropdown to work with Typescript:

<script lang="ts">
    import { Dropdown } from "carbon-components-svelte";
    let items = [
        { id: "0", text: "Slack" },
        { id: "1", text: "Email" },
        { id: "2", text: "Fax" },
    ];
</script>

<div>
    <Dropdown titleText="Contact" selectedId="0" {items} let:item let:index>
        <div>
            <strong>{item.text}</strong>
        </div>
        <div>
            id: {item.id} - index:
            {index}
        </div>
    </Dropdown>
</div>

<style lang="scss">
    :global(.bx--list-box__menu-item, .bx--list-box__menu-item__option) {
        height: auto;
    }
</style>

In the console I get this warning on every refresh: <Dropdown> received an unexpected slot "default".
The rendered output shows the Dropdown with the standard UI. Do I need to do something special to make it work with ts?

[metonym]

What version of carbon-components-svelte are you using?

[Lucide]

I'm using svelte latest 3.46.4 and carbon-components-svelte latest 0.62.2.

I've seen that the <Dropdown> received an unexpected slot "default" warning might be a known svelte issue and unrelated to this problem (here)

[metonym]

This is what I see using Svelte/TypeScript in VS Code:

Can you try restarting the Svelte Language Server in your IDE?

[Lucide]

I apologize, this was yet another side effect of TS type resolution being broken on my project for some reason.
I thought I was reproducing the issue on a template Svelte project, but I was not! It works correctly there.
I'll have to take a deeper look to the generated tsconfig files.
Thank you for the heads up!

[Lucide]

Very strange, in a desperate attempt to reproduce the problem, I ended up recreating the entire project from scratch inside a test folder (incremental file copy-paste, no rewriting).
Now I have two ~identical folders, one that exhibits the issue and one that doesn't...
Tried:

• renaming root folder
• clean npm reinstall
• tinkering with every file in the folder, triggering reloads

At a closer inspection, it seems that this error might actually be different from the typing issue I mentioned earlier, which occurs nonetheless.
(an entire package/library is shown as having type any). I'm using VSCode, with the official Svelte extension.

Edit:

After two days of scrambling and many full-tree diffs, I learnt a new thing about NPM:

⚰