tabline is disabled while using vimshell

[itchyny]

Using C-c in vimshell disables the tabline of lightline.
Probably lightline#tabline and lightline#onetab are called too often.

To reproduce:

tabnew
:VimShell
sleep 10<CR>
<C-c>

[itchyny]

With neocomplete settings

  let g:neocomplete#enable_cursor_hold_i = 1
  let g:neocomplete#cursor_hold_i_time = 50

[itchyny]

Using neocomplete with enable_cursor_hold_i causes conflict with vimshell.
Cannot be helped.