fish doesn't respond to input, if process inside config.fish suspended (ctlr+z)

[ArtAndreev]

I run tmux inside config.fish with the following code:

if status is-interactive && test -z "$TMUX"
    set -l tmux /opt/homebrew/bin/tmux
    $tmux attach -t main 2>/dev/null || test $status -le 128 && $tmux new -s main
end

Then if I suspend tmux-client with prefix key (ctrl+b), then ctrl+z, I get empty screen, where I can type, but shell doesn't respond to any command.

I tested the same with zsh, zsh suspends succesfully, that means I can run commands and resume tmux-client later.
Code for .zshrc:

if [ -z $TMUX ]; then
  tmux=/opt/homebrew/bin/tmux
  $tmux attach -t main 2>/dev/null || [ $? -le 128 ] && $tmux new -s main
  unset tmux
fi

OS: macOS 13.3.1 (a)
Terminal: alacritty 0.12.0
TERM (inside tmux): tmux-256color
TERM (outside tmux): alacritty
tmux: 3.3a
fish version: 3.6.1