Fix #296

lua/cmp/utils/window.lua

@@ -41,12 +41,13 @@ window.ensure = function(self)
   for _, name in ipairs({ 'buf', 'sbuf1', 'subf2' }) do
     if not (self[name] and vim.api.nvim_buf_is_valid(self[name])) then
       self[name] = vim.api.nvim_create_buf(false, true)
+    end
+    -- We always apply options to the buffer to support session related plugins.
     vim.api.nvim_buf_set_option(self[name], 'undolevels', -1)
     vim.api.nvim_buf_set_option(self[name], 'buftype', 'nofile')
     vim.api.nvim_buf_set_option(self[name], 'bufhidden', 'hide')
   end
 end
-end
 
 ---Set window option.
 ---NOTE: If the window already visible, immediately applied to it.