Asyncio subprocess is not being cancelled properly on interrupt

I have the following code that doesn’t work the way I expected it to. I wanted to be able to interrupt my program with SIGINT (Ctrl-C). It should then cancel tasks that run subprocesses and run some code upon cancellation, but I can’t get that section to run. It’s seems like the signal is being intercepted by something other than the event handler I set up. This isn’t what I expected.

Run on ubuntu 22.04 python 3.10.6 and also a docker image for python 3.11.2

import asyncio
import signal

jobs = set()

async def create_worker():
    task = asyncio.create_task(worker())
    jobs.add(task)
    task.add_done_callback(jobs.discard)

async def worker():
    try:
        proc = await asyncio.create_subprocess_shell('sleep 10')
        await proc.communicate()
        print("done")
    except asyncio.CancelledError:
        print("my task is getting cancelled :\") # should run this section, but doesn't
        raise

async def main() -> None:
    loop = asyncio.get_event_loop()
    loop_hold = asyncio.Event()

    async def graceful_shutdown():
        unfinished_jobs = list(jobs)

        for job in unfinished_jobs:
            job.cancel()

        await asyncio.wait(unfinished_jobs)

        loop_hold.set()

    loop.add_signal_handler(
        signal.SIGINT,
        lambda: asyncio.create_task(graceful_shutdown())
    )

    for _ in range(10):
        await create_worker()
    
    await loop_hold.wait()

if __name__ == "__main__":
    asyncio.run(main())

When I interrupt the program with Ctrl-C before command completion, I was expecting to run some code on worker cancellation. Maybe something like the following:

my task is getting cancelled :
my task is getting cancelled :
...
my task is getting cancelled :

but I’m getting this instead:

done
done
...
done

I’ve also tried this with asyncio.create_subprocess_exec but I’m getting the same problem.