First of all kudos for the effort!
If I'm not mistaken a spinner element is missing. How can I replicate a similar behavior during reload/render/transitions?
You're right, we have spinner by default when making a network request for Android, but the iOS version doesn't include this. This needs to be added. I just created an issue here for the iOS version https://github.com/Jasonette/JASONETTE-iOS/issues/82