can't generate multiple lines

Let's say I have codes like this below:

```
let a = console.draft(' ')
let b = console.draft('')

setInterval(() => {
a('something')
b('something')
}, 1000)
```

It only shows `a` string.

Start by running the JavaScript example with two console.draft calls and observe how the interval updates the terminal. Trace the console.draft entry point to determine why only the first drafted line is retained; done means both strings are displayed and updated independently.

Written by the indexing model from the issue text.