[Bug]: loose bufferline bar if switch session that not current in a session?

[tmpm697]

Is there an existing issue for this?

• I have searched the existing issues

What happened?

more in here: rmagatti/auto-session#196 (comment)
and: rmagatti/auto-session#197

tools:

https://github.com/nvim-telescope/telescope-project.nvim
https://github.com/rmagatti/auto-session
bufferline.nvim and neovim 0.8.2/nighly

I got this issue, step (clean up/remove all saved session files from cache):

1. use :Telescope project to create project/session A and B (with different directory)
2. cd "$(mktemp -d)"
3. nvim
4. :Telescope project and then ctrl-l to switch session A, and then open some buffers
5. same as 4 but with B
6. switch back and forth between A and B --> perfect, bufferline.nvim show its bar and buffers's name/title
7. exit nvim
8. nvim
9. select project A and B back and forth 
10. observe that there're no bufferline's bar exist --> bufferline completely not appear

why and how bufferline disappear when restore session and its' not happen in first session when create them. @rmagatti 

after 10 if i go to A project's folder and then start nvim, bufferline shows as usual.

sum up:

1. if first open nvim and create projects and switch between them, you don't need to under a session, still work perfect switching
2. after projects created, you NEED to under a session/project to have bufferline bar appear between switching, if not you'll loose bufferline bar.

What did you expect to happen?

I can cd /path/of/whatever and then start nvim and can switch back and forth session/projects with nvim, telescope-project and auto-save plugin enabled.

Config

-- i'm using lazy.nvim to load bufferline.nvim
return {
"akinsho/bufferline.nvim",
event = "BufReadPre",

config = function()
	require("bufferline").setup({
		options = {
			show_close_icon = false,
			diagnostics = "nvim_lsp",
			-- always_show_bufferline = false,
			separator_style = "thick",
			offsets = {
				{
					filetype = "neo-tree",
					text = "Neo Tree",
					-- highlight = "Directory",
					text_align = "left",
				},
			},
		},
	})
end,

}

Additional Information

...

commit

No response

[tmpm697]

I also tried above with vim.o.sessionoptions = "globals" as suggested in #649, same result, still need to cd to one of session/project's folder.

[tmpm697]

I've switched to https://github.com/noib3/nvim-cokeline and don't see this issue, feel free to close.