Only delete autocmds for the current buffer with the group name

init.lua

@@ -542,9 +542,12 @@ require('lazy').setup({
 
       vim.api.nvim_create_autocmd('LspDetach', {
         group = vim.api.nvim_create_augroup('kickstart-lsp-detach', { clear = true }),
-        callback = function()
+        callback = function(event)
           vim.lsp.buf.clear_references()
-          vim.api.nvim_del_augroup_by_name 'kickstart-lsp-highlight'
+          local cmds = vim.api.nvim_get_autocmds { group = 'kickstart-lsp-highlight', buffer = event.buf }
+          for _, cmd in ipairs(cmds) do
+            vim.api.nvim_del_autocmd(cmd.id)
+          end
         end,
       })