Hi @emozio, I'm sorry you've been experiencing loss of progress in your applications. We are currently investigating the root cause of this issue in order to fix it for good.
Ideally, our changes would be saved automatically and we wouldn't need to manually save them. However, we've seen that this is not working perfectly right now.
It seems to be related to Retool migrations, if you open the History tab and restore your app to the save before the latest migration, you'll recover the state of the app and will able to make changes that get saved.
This is not a great experience and I'm sorry for asking for this extra work whenever this issue presents itself. That being said, you do provide a great alternative, I've extended this feedback internally. Thank you for sharing!
In case you would like to see the full report of this incident: