Stored var not working on web app


I have an app with multiple screens, the first screen is used for login against a firebase DB and email is stored on a var to use it across the screens.
It all works perfectly well when testing from a deployed app or live testing via mobile thunkable app but when deploying on web app variables content are lost past the signing screen. It wont work neither with stored nor cloud var

I’ve tried on android and iOs…Chrome, firefox or Safari and either of this combinations is working…

Any idea what can be happening?