check initialized so autoloaded plugins happen first

autoload/airline/extensions.vim

@@ -129,7 +129,7 @@ function! airline#extensions#load()
     call airline#extensions#tagbar#init(s:ext)
   endif
 
-  if g:airline_enable_csv && exists(':Table')
+  if g:airline_enable_csv && (get(g:, 'loaded_csv', 0) || exists(':Table'))
     call airline#extensions#csv#init(s:ext)
   endif
 

plugin/airline.vim

@@ -88,9 +88,10 @@ function! s:airline_toggle()
       autocmd WinEnter,BufWinEnter,FileType,BufUnload,ShellCmdPost *
             \ call <sid>on_window_changed()
     augroup END
-    " update statusline now
+    if s:airline_initialized
       call <sid>on_window_changed()
     endif
+  endif
 endfunction
 
 function! s:get_airline_themes(a, l, p)