Hi Leanne,
Huh! It’s lovely to learn a new thing 
The PhDs I’ve worked with show a preference for sentence case, as do a lot of the general styles they use. I’ve tried the sentence case option with APA 6th and it works nicely. It does require modification of the style (APA 6th default is “leave titles as entered”) but would save the researchers quite a bit of time.
(Note: on testing, it converts proper nouns like people and place names to lower case, so some final “plain text” checking and tweaking would be required.
Clarivate has replicated my issue with changing of case not triggering the save. We’ll see what the developers have to say about it.
Thank you.