1. Ensure you're signed in on device 1 and device 2.
2. On device 1, save an article and add it to a reading list.
3. Sync device 2's reading list. The article will show up in the reading list, but not in "All articles". It should show up in both places.

This only happens when device 2 is an iOS machine.

This is true when device 1 in Android. Not sure if it's also true if device 1 is iOS.