Autocomplete not working only for AWS CLI

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue

### Operating system

macOS 15.4.1 (24E263)

### Expected behaviour

The autocomplete popup will appear when I press space after typing `aws` in my terminal

### Actual behaviour

The autocomplete popup does not appear.

If I type `gh`, then the autocomplete popup appears when I press space, as expected.

I've tried:
- Running `q doctor`:
```
➜ ~ q doctor

● Inline is disabled, to re-enable run: q inline enable
✔ Everything looks good!

Amazon Q still not working? Run q issue to let us know!
```

- Run `q restart`
- Restarting my terminal (iTerm2)
- Restarting my computer
- Uninstall/reinstall Amazon Q

Video of reproduction:
https://github.com/user-attachments/assets/99c4f709-83f2-4227-a173-62d66b29d7fd

### Steps to reproduce

1. Open a terminal and type `gh` followed by a space: The autocomplete popup appears
2. Repeat step 1 but with `aws`: The autocomplete popup does not appear