`:Buffers` available but `not an editor command`

### Checklist

- [x] I have fzf 0.54.0 or later
- [x] I have searched through the existing issues

### Output of `:echo system(fzf#exec() .. ' --version')`

0.61.1 (93cb3758)

### OS

- [ ] Linux
- [x] macOS
- [ ] Windows
- [ ] Etc.

### Problem / Steps to reproduce

I see `:Buffers` as an available command (even an option when I try to autocomplete a command), but when I run it I get an error: `not an editor command` the first time, then the command disappears from my available commands list. Not sure when the regression started manifesting, but I successfully used this in the past months.

My `nvim` version is:
```
NVIM v0.12.0-dev-360+g7369f80b19
Build type: Release
LuaJIT 2.1.1744317938
Run "nvim -V1 -v" for more info
```