In the comments section, the person who appears to be from Spark:

> Hello guys,

> Thank you for the feedback and comments! Our team has been investigating this a for a few hours.

> What we know so far: 1. There's no breach or data leak according to our investigation. 2. The new, faster AWS server logic might have triggered iCloud security algos. We are already working with Apple to learn more details.

> We are doing some server side work to make Spark much faster, and to make it ready for the Mac version , which is already in Alpha.

> We will keep you updated once we have more news from Apple side.

> Thank you.