Path autocompletion in cmdline_popup automatically selects matches that end with s

[Gordin]

Edit: Made a PR with a fix for this: #189

Describe the bug
When I open the cmdline popup and try to use the autocompletion for a path, as soon as one of the options ends with s, the autocompletion popup just flickers, closes, and that option is chosen. After that, when you continue to press <TAB> it just seems to continue to just choose the first option immediately. Happens without configuring anything and with popupmenu.backend set to either nui or cmp. With cmp I can still select files inside the folder, with nui I can't, but the automatically selecting the directory happens in both cases. I only tested cmp with my full config, but the problem also appears in the minimal config I posted below.

Which version of Neovim are you using?
NVIM v0.9.0-dev-5e1687e-dirty (latest git master)

To Reproduce
Steps to reproduce the behavior:

1. init.lua I used:

local execute = vim.api.nvim_command
local fn = vim.fn

local install_path = fn.stdpath('data') .. '/site/pack/packer/start/packer.nvim'

if fn.empty(fn.glob(install_path)) > 0 then
  execute('!git clone https://github.com/wbthomason/packer.nvim ' .. install_path)
  execute 'packadd packer.nvim'
end

vim.opt.termguicolors = true

require('packer').init({display = {auto_clean = false}})

require('packer').startup(function(use)
  use { 'wbthomason/packer.nvim' }

  use { 'MunifTanjim/nui.nvim' }
  use { 'rcarriga/nvim-notify'  }
  use { 'folke/noice.nvim' }
end)

require("notify").setup()
require("noice").setup()

2. hava directory called s or some other directory that ends with s.
3. do :e ./ or :e / and hold <TAB>

Expected Behavior
<TAB> should select the next option instead of selecting the one with s at the end...

Screenshots

Noice Log
I deleted the log and recreated the bug, but :Noice log is still empty after.