The third paragraph contradicts your other point. You define E2EE in two wildly different ways.

The chat messages are most likely stored on an intermediary server, which would qualify for the same loophole you pointed out in the cloud storage example.

No, the other ancestors are all native American. Obviously the child stayed in the native to community.

There may be several reasons for this. If I had to guess, they found a critical flaw and had to shut it down for security reasons.