zsh-autocomplete: fzf trigger sequence (**) does not work as expected (even using control + space)

This is some really cool work. Thanks for sharing it!

Describe the bug

The fzf search menu no longer seems to pop up when the trigger sequence is used when zsh-autocomplete is enabled, even when using the new shortcut—<kbd>control</kbd><kbd>␣</kbd>.

To Reproduce

Steps to reproduce the behavior:

% zsh -df

% [ -f ~/.fzf.zsh ] && source ~/.fzf.zsh

% cat dir/** [TAB]
>
3/3
> dir/file1.txt
> dir/file2.txt
> dir/file3.txt

% source ~/dir/dir/zsh-autocomplete.plugin.zsh

% cat dir/** [CTRL][SPACE]
file1.txt    file2.txt    file3.txt

Of course, this fixes itself if I run zstyle ':autocomplete:tab:*' completion fzf. <kbd>tab</kbd> is now controlled by fzf, and the trigger sequence ** works as expected. But then normal autocomplete seems broken at that point.

Expected behavior

I thought <kbd>control</kbd><kbd>␣</kbd> (with zsh-autocomplete) would trigger the kind of behaviour fzf would trigger by hitting <kbd>tab</kbd> normally (without zsh-autocomplete).

Desktop

• OS + distribution: macOS 10.15.5
• Zsh version: 5.7.1
• Plugin version: 33d98129