Chrome Version: 67.0.3389.0 (ToT)
OS: Linux

What steps will reproduce the problem?
(1) Attempt to trigger dictionary AiS
(2) Type the entire word
(3)

What is the expected result?
Since the entire word is typed, there shouldn't be any difference between it and the word in the definition.

What happens instead?
The suggestion still shows the last character bolded, as though you hadn't typed it yet.

It's only off-by-one when you've entered all the chars. Having fewer chars displays correctly.

chartreus -> chartreusE (correct)
chartreuse -> chartreusE (incorrect)
chartreuse -> chartreuse (would be correct)