Words get broken when hyphenation is off with no hyphens
Illustrator (since a long ago) has a habit of breaking words in area type texts when it should not. Take a look at the test file and watch the attached GIF.
As you can see, the second word is a long one, and Ai for some reason breaks it — although Hyphenate is off (and the language is properly chosen).
No hyphen also is displayed at the end of the line, the word is just split.
If we toggle the Composer from Single-Line to Every-Line, Ai at first correct the tracking and fits the word... but once the container is resized, it gets broken again... and sometimes, when nothing else is done, it gets recalculated again! ...but sometimes not, and it’s even worse, because non-reliable.
InDesign does it properly, whatever composer is chosen, whatever language.
No hyphenation should mean NO hyphenation. Words should break like this only when a container width is smaller than the word — and you can see it’s not the case here.
Works the same on Mac and Windows.