I am not sure if this is related to the prev patch of @mattn or not, but console vim on windows has some issue with pmenu redraw:
https://i.imgur.com/rVvoti3.gif This is YCM plugin with console vim 8.2.2000 (with set nolazyredraw) -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to vim_dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/vim_dev/a6d722e1-d441-45b2-9943-a00dcd2e4401n%40googlegroups.com.