Apple logs 4 months’ worth of call history to iCloud sans consent or control

Macworld reports that Moscow-based Elcomsoft has discovered and announced that “Apple saves up to four months of a user’s call history whenever they are using iCloud Drive.”

Precious little mention is made of this fact: Apple’s security white paper released in May, a PDF document "that few users would ever read,” according to the linked article, is the only place where this is mentioned. Disconcertingly, any mention of this is carelessly omitted from two places where not only an opportunity, but also a duty to disclose this fact exists:

• iCloud security and privacy overview
• iCloud: iCloud storage and backup overview

Why is this important little fact about users’ privacy tucked away in such an abyssopelagic place on Apple’s website? And why is it that one cannot turn it off, save for refraining from any use of iCloud Drive?

Question: If one gets a new phone and syncs it to the iCloud Drive being used by one’s previous phone, does that extensive call log get placed in the new phone’s call history?