I just did

export let x = 1;

and then

const myModule = await import("my-module");
myModule.x = 2;
const myX = myModule.x; // myX will be 1...

The value of myX was a bit unexpected.
Could you please warn about this? (I am using your Visual Studio Code extension. The extension is very nice! <3)

The accepted answer here explains the problem:
https://stackoverflow.com/questions/32558514/javascript-es6-export-const-vs-export-let