Comment on Get Hands-on with Zerodha Mobile
The app has been designed to log you out if there’s inactivity for over 30 minutes on your phone. This has been done for security reasons.
If you’re having this problem while using other apps without the phone being idle, I guess there’s a workaround. Depending on which phone you’re using you need to get to the Open Apps menu and access Zerodha Mobile from there, this should ideally take you back to the screen you were originally on.