This is not a bug, just a suggestion for user configuration, so feel free to close this one immediately.
If you are using Vim-Plug, you probably have something like this in your vimrc to install plugins on startup. However, this version also closes the buffer again after that and shows Startify:
" Run PlugInstall if there are missing plugins
augroup plugins_check
autocmd VimEnter * if len(filter(values(g:plugs), '!isdirectory(v:val.dir)'))
\| PlugInstall --sync | source $MYVIMRC | execute 'close' | execute 'Startify'
\| endif
augroup END
This is not a bug, just a suggestion for user configuration, so feel free to close this one immediately.
If you are using Vim-Plug, you probably have something like this in your vimrc to install plugins on startup. However, this version also closes the buffer again after that and shows Startify: