Nested autocmds not triggered on DirChanged

Any reason why for `DirChanged` nested autocmds are not triggered? I see that for other events there is option `nested = true` set.

What I'm trying to do is change colorscheme in `.nvim.lua` (this works) and it should trigger ColorScheme event for setting up lualine theme, but event is not triggered.

Start with the .nvim.lua loading path and Neovim's DirChanged autocmd behavior; reproduce a colorscheme change and observe whether the ColorScheme event fires. Done means nested autocmds triggered by DirChanged behave consistently with the other events and allow the lualine theme setup to run.

Written by the indexing model from the issue text.