Oops. If it's an Android you could try clean the cache of the app. That resets the app memory but should preserve the login. You don't do clean the data else that does clean everything back to a newly installed app then you'd have to login again. Those are standard Android tricks for badly behaving programs. Again in Android if you got too much loaded up at once that can interfere with the program. So you close down apps you don't need. Probably something similar on iPhone.
Clear the data comes in if the programmer has extended the fields they are writing out as data. It's like a solid state array. If the program gets updated then it reads the wrong bits of the array. I've seen that happen with Android programs where they should have put a migration route in the update, but haven't, so you are advised to clear the data and cache in that one but you'd need to login again.
It could be the app or the car. Programs taking a wander out of memory in either. The
Formentor use to have loads of recorded errors on a scan... not sure what the situation is now. But all those "errors" do mean something. The MQB Evo platform had or has an ability to generate an array of VCDS /
Obdeleven scan errors. If the cars monitoring system goes off on one then I'd say it could appear on the app side.
The original MQB platforms generate far fewer errors so an
Obdeleven scan you get to know which are the old faithfuls that don't mean a lot and which are new errors which could mean something. Another health check if you have
Obdeleven or VCDS to keep an eye on what errors that are being thrown up. Anarchy may prevail thou if it's like early Formentors with many recorded errors. The
Ateca / Arona I do a clear down if the car appears fine so next time you start with a blank sheet to
review as to what has appeared. We haven't had anyone doing a scan of a Tavascan so far. Things like front assist obscured due to wet weather gets registered... that's a nothing. Bus errors in the
Ateca again nothing... so my thinking is an internal comms error between systems in the car could also manifest itself on the app side saying something has happened when it's not.... or it could be the app.
