Wha? I’ve not experienced that, do you have a reproducible test-case? If so then it should definitely be submitted as a bug report!
Nor have I noticed this?
Hmm, not noticed this either but I often cancel auto-fills anyway. ^.^
Ooo tell me more? How does this work with Elixir? 
Emacs has fantastic debugging facilities, but none for Elixir that I’ve seen…
