All scanned tests and certificates erased

7u771e commented 2 years ago

Avoid duplicates

[X] Bug is not mentioned in the FAQ
[X] Bug is specific for iOS only, for general issues / questions that apply to iOS and Android please raise them in the documentation repository
[X] Bug is not already reported in another issue

Technical details

Device name: iPhone SE MXD22ZD/A A2296 128GB
iOS version: 15.2.1 (19C63)
App version: 2.16.2 (0)
Backup to iCloud is on, iCloud storage is availabe
App offloading is on
Active Region Germany, Notification, Exposure Sharing and Travel Status On

Describe the bug

When opening the app for the first time the day, it/the phone prompted me to give permission for exposure notifications, which I already did long ago. All my tests and vaccination-certificates are gone. The Journal is empty. It looks like a fresh installation without any data.

Steps to reproduce the issue

Not reproducible, the app is empty now, except from the test I entered today.

Expected behaviour

As a user I expect Certificates and tests saved in the CWA to always be available, whether my device is online or offline or the storage is full. The status offline/full may happen at any time at the most inconvenient situation and the CWA is the tool I rely on to present my certificates.
The information may be recreatable in theory by re-scanning the original codes, but those codes are usually not at hand when the CWA is used.
As a user I expect to have continuous exposure tracking when using the CWA. It is not clear to me now whether the prompt to reauthorize CWA for exposure tracking means that there is a gap in my data. As a user I can't see the period logged from within the app, so I can't know if the prompt was "just a glitch" or if it means that my exposure data of two weeks is not used anymore.

Possible Fix

I feels as if the data of the CWA either was purged or damaged or deleted by a transient low space situation of iOS. Maybe it is in parts not marked properly according to paragraph 4 of https://developer.apple.com/icloud/documentation/data-storage/
From what I read data can be at the same time excluded from backup but save from purging.
The period of exposure data the CWA is referring to should be visible to the user. Instead of "no exposures" "no exposures between datefirst and datelast" would be a useful message on the second screen of the exposure Info (the green/red panel). (Ah, feels like a feature)

Additional context

In the night before my iPhone briefly showed a warning concerning insufficient storage but it "fixed itself" - I guess by cleaning up volatile data or by App offloading. However I don't remember that CWA was offloaded and reinstalled this morning!

The exposure Log of the phone still contains continuous records for two weeks. Vaccination status for 3 vaccinations was lost, the information was entered many weeks and months ago. Multiple rapid tests had been entered and deleted within the period.

I have been using the CWA on iOS since the first versions. I have been using it in Austria and Switzerland, too, with the options that were available at that time.

Internal Tracking ID: EXPOSUREAPP-11600

Ein-Tim commented 2 years ago

There was a similar report from @Pelikan3857 back in mid-2021: https://github.com/corona-warn-app/cwa-app-ios/issues/1521

Both issues have in common that the device ran out of space.

dsarkar commented 2 years ago

@7u771e Thanks for the report. Do you know if this happened in context with an update to CWA 2.16.2 or maybe with an iOS update?

Best wishes, DS

Corona-Warn-App Open Source Team

7u771e commented 2 years ago

@dsarkar While the iPhone is on auto-update, it is still on 15.2.1 and my CWA has been updated on 2022-01-22. So it does not seems as if there was a nightly update involved.

larswmh commented 2 years ago

We have created an internal ticket for your issue and will raise this topic internally. Internal Tracking ID: EXPOSUREAPP-11600

Corona-Warn-App Open Source Team

dsarkar commented 2 years ago

@7u771e Thanks for your feedback.

ndegendogo commented 2 years ago

Just a question. The OP mentioned app offloading. Does cwa support such a scenario? It means that all data be "off-loadable" and then of course restorable again - right? As far as I understand, not even all cwa data are included in a backup - is this still the case, or is my understanding outdated?

Does iOS provide some API or similar interface so that an app can prevent being off-loaded (e.g. if this is not supported by the app)?

Ein-Tim commented 2 years ago

Is there any updater on this issue available?

corona-warn-app / cwa-app-ios