Yankstack conflicts with auto save autocmd #61

I'm observing a conflict between my auto save autocmd and yankstack. Instead of cycling though the yank stack the same text is pasted again.

Here is the autocmd in question:

augroup auto_save
  autocmd!
  autocmd CursorHold,InsertLeave * silent! wall
augroup END

Is there a known workaround or the possibility to avoid the conflict?

Btw: thank you for this wonderful plugin <3