Buffers aren't removed when saving session in windows

[eduardoarandah]

For some reason, (in windows) buffers can't be removed from session.
This happened recently, not sure when but might be somewhere in the last 2 months.

Config:

Plug 'romgrk/vim-session'

let g:session_autoload = 'no'
let g:session_autosave = 'yes'
let g:session_directory = $HOME."/.vim/sessions"
let g:session_extension = ''

" Create dir
if !isdirectory($HOME."/.vim/sessions")
  call mkdir($HOME."/.vim/sessions","p")
endif

Version:
Editor: Gvim 8.2
Platform: Windows 10

Not sure about version, I get this on git log:

commit f440c32a966f17b6694e8629af2aa98fbb4df23f (grafted, HEAD -> master, origin/master, origin/HEAD)
Author: Rom Grk <romgrk.cc@gmail.com>
Date:   Mon May 25 23:28:36 2020 -0400