In tmux, vim .fzf/**<tab> search path problem

[hugeying]

Checklist

• I have read through the manual page (man fzf)
• I have searched through the existing issues
• For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.54.2 (brew)

OS

• Linux
• macOS
• Windows
• Etc.

Shell

• bash
• zsh
• fish

Problem / Steps to reproduce

set the following:

export FZF_DEFAULT_COMMAND='fd --type f --hidden --exclude .git'
export FZF_DEFAULT_OPTS='--tmux 70%'

In tmux, vim .fzf/**<tab> the search path is in the current directory, not in the .fzf/