cp does not work when using manjaro-zsh-config

1. manjaro-zsh-config was pre-installed on VM by default. (Use the unstable branch)
2. Open zsh terminal
3. Run cp file_A file_B
4. See the error:

cp: missing file operand
Try 'cp --help' for more information.

5. Switch to bash on this terminal, that has no issue.

I checked manjaro-zsh-config:

$ cat /usr/share/zsh/manjaro-zsh-config | grep cp
alias cp='f(){ cp ${1:--i} };f'                                 # Confirm before overwriting something

That causes the issue.