option 'resume' doesn't work properly

[orokasan]

Warning: I will close the issue without the minimal init.vim and the
reproduction instructions.

Problems summary

After starting ddu.vim with 'resume' option, ddu ignores specified source and always startup with the resumed buffer.
Seems f97f6a3 is related to this problem.

Expected

ddu opens with specified options.

Environment Information

• ddu.vim version (SHA1): 13273fd

• denops.vim version (SHA1): a40e0c1

• deno version(deno -V output): deno 1.24.1

• OS: macOS 12.4 (21F2081)

• neovim/Vim :version output: NVIM v0.8.0-dev-751-g8952def50

Provide a minimal init.vim/vimrc without plugin managers (Required!)

let s:plugins = [
      \ 'vim-denops/denops.vim',
      \ 'Shougo/ddu.vim',
      \ 'Shougo/ddu-ui-ff',
      \ 'Shougo/ddu-source-file',
      \ 'Shougo/ddu-source-file_old',
      \ ]

for item in s:plugins
  execute 'set runtimepath+=~/.cache/dein/repos/github.com/' . item
endfor

call ddu#custom#patch_global({
  \ 'ui': 'ff',
\ })

How to reproduce the problem from neovim/Vim startup (Required!)

1. :call ddu#start({'sources':[{'name':'file'}]})<CR>
2. :close<CR>
3. :call ddu#start({'resume': v:true})<CR> # open 1. buffer
4. :close<CR>
5. :call ddu#start({'sources':[{'name':'file_old'}]})<CR> # still open 1. buffer

Screenshot (if possible)

Upload the log messages by :redir and :message (if errored)