I have the phrase "It will be apparent to a person skilled in the art" [11 words] in my Glossary, but it isn't being suggested by auto-complete. What am I missing here?
Hmm, it did just work with the phrase "It will be appreciated that", which is in the same Glossary.
In Edit > Preferences > Workflow tab, try changing the Auto-completion's start at value from the default 3 to 2. Then, it should trigger the suggestion just after typing "It" in your example.
Thanks, that fixed it! Thought I already had it set to 2, as I usually, do, but seems I forgot to change it during my last installation of CT.