:Lines seems broken in Neovim 0.5

- [x] I have fzf 0.23.0 or above
- [x] I have read through https://github.com/junegunn/fzf.vim/blob/master/README.md
- [x] I have read through https://github.com/junegunn/fzf/blob/master/README-VIM.md
- [x] I have read through the manual page of fzf (`man fzf`)
- [x] I have searched through the existing issues

Hi, I really love fzf. Usually I only use Rg and Files. However, recently, Ive been trying to explore more functionalities such as :Lines. However, :Lines isnt behaving. Specifically, a column of '1's on the left and the 'bat error' message:
Here is a screenshot of :Lines:

Here is a screenshot of :Files which works fine:

I am using updated versions of tmux, alacritty, bat, ripgrep, neovim on macOS
My configs are:
```
//init.vim
let $FZF_DEFAULT_COMMAND = 'rg --files --hidden'
let g:fzf_preview_window = ['up:50%', 'ctrl-o']
command! -bang -nargs=* Rg call fzf#vim#grep('rg --column --line-number --no-heading --color=always --smart-case '.shellescape(), 1, fzf#vim#with_preview({'options': '--delimiter : --nth 2..'}), 0)

//.zshrc
export FZF_DEFAULT_OPTS=" --preview-window=up,50% --preview 'bat --color=always --style=header,grid --line-range :300 {}'"
export BAT_THEME="Visual Studio Dark+"
```
I apologize if I missed something obvious, I am quite new to coding. Thank you in advance and thank you for the amazing plugin.