Cwa-app-ios: High-risk exposure n days ago and low-risk exposure m days ago are displayed as high-risk exposure m days ago when n>m

[rsplaul]

Describe the bug

After a high-risk exposure several days ago I have been in quarantine last week, when the app reported a new exposure (probably related to #1234) "2 days ago". Sure enough the app still showed the red tile (from the first exposure), but in the details screen it also explained, that a long-time exposure has happened 2 days ago. After the end of the quarantine (14 days after the high-risk exposure), the app switched back to the green low-risk tile. So the second exposure obviously only was a low-risk encounter (which still is a mystery to me …).

Expected behaviour

The app should differentiate between high-risk and low-risk exposures and report the last high-risk exposure accordingly. For people who are in quarantine, a red tile stating that there has been a high-risk exposure within the time range of their quarantine, this can be quite confusing. Also, the technical hotline (including second level) knows nothing about this behaviour.

Steps to reproduce the issue

1. Get high-risk exposure
2. Get low-risk exposure within 14 days, i.e. before the high-risk exposure is idled out.

Technical details

• iOS Version: 14.0.1
• Device: iPhone 11 Pro
• CWA Version: 1.3.2

Possible Fix

My suggestion would be to either ignore the low-risk exposure (until the high-risk exposure is idled out) or, better, display both kinds of exposure separately. At the least, the verbose message in the details screen, stating a high-risk exposure "m days ago", when in fact the last high-risk exposure in n days ago and n>m, is misleading and should be corrected.

Additional context

The two screenshots show the main screen of the app before and after the daily update 14 days after a high-risk exposure. A screenshot of the details screen unfortunately isn’t available. (The message, that the app was active only 2/14 days, is because I had tried to uninstall and reinstall the app after seeing the misleading red tile.)

[Ein-Tim]

Please see: https://github.com/corona-warn-app/cwa-documentation/issues/422. If what's described there is the same what you experienced, please follow up there.

[rsplaul]

Indeed, a duplicate of https://github.com/corona-warn-app/cwa-documentation/issues/422

[heinezen]

Duplicate of https://github.com/corona-warn-app/cwa-documentation/issues/422