[Bug]: Project still running after deletion

### Problem description

I was exploring about doing cron job in Deno Deploy with this library `https://deno.land/x/deno_cron/cron.ts` to make fetch post request to my discord server and it was a success but still running after i delete the project.

### Steps to reproduce

1. Open Deno Deploy playground
2. Create webhook on discord
3. Back to deno deploy, code the cron job every 2 seconds
4. Saved and deployed
5. Having success result, i got my message every 2 seconds
6. I want it to stop, so i comment the cron job code
7. Saved and deployed but still getting messages
8. I delete the project
9. Still getting messages
10. After a while, (and in a moment of writing this), the message is actually stops.
11. It was only a delay after all, i understand

### Expected behavior

The project stops after code change and deletion.

### Environment

Default playground

### Possible solution

At least showing the UI that the project is in the process of deletion and wasn't fully stops.

### Additional context

_No response_