triggering autocompletion when using actions rather than insert mode

[cole-brokamp]

Typing something like import re leads to the appropriate autocompletion, but if I go on typing and then come back, move my cursor to re and change the word with ciw, autocompletion doesn't trigger after the word is deleted and I've entered insert mode.

I would expect the behavior that autocompletion would work when changing/replacing words/blocks/inner quotes/inner parens/etc