Can not assign ID through `@output(id=id)` in render.download

[weichisyu]

When I use @output(id=id) to assign an ID, it triggers a 404 error.

INFO:     127.0.0.1:55235 - "GET /session/xxxxxxxxx/download/download4?w= HTTP/1.1" 404 Not Found

I thought the first example was just a demo showing how to throw an error.
But when I edited the code to the second version, it still resulted in a 404 error.
source link
First:

    @output(id="download4")
    @render.download(filename="failuretest.txt")
    async def _():
        yield "hello"
        raise Exception("This error was caused intentionally")

Second

    @output(id="download4")
    @render.download(filename="failuretest.txt")
    async def _():
        yield "hello"