What product edition - I assume Qlik Sense Enterprise Server?
This does not sound familiar to me, I will check internally.
You access the app, edit, make changes (if using Qlik Sense Enterprise) those changes should save immediately, there isn't any save button in Enterprise.
Can you share some screen shots too?
Please mark the appropriate replies as CORRECT / HELPFUL so our team and other members know that your question(s) has been answered to your satisfaction.