I press 5 to have 'hydraulische druk' inserted:
That's my final choice. Period.
No need to suggest another choice for 'druk':
I have to press escape to close this suggestions box.
Could you please tweak the auto-completion in such a way that when a word is part of a previously inserted multi-word suggestion, this word isn't used again as the first word of another multi-word suggestion.
At least, this is what has bothered my always with AC. Perhaps for other users this proactivity is very useful? If so, they should stand up and speak out loud.