Lately (since last week or so), there have been issues with publishing changes. The changes are not readily deployed into production.. then we end uoo republishing 3-4 times over the period of 3-4 hours before we see the changes reflected in the live app. So I am not sure if it now takes 2-4 hours for changes to reflect in live app or there is issue with publishing changes and one needs to keep trying until you see changes in live app..
it used to be very smooth, publish and the changes would be live in 15 min. Would love to get back that kind of process..