I had an error message for several days that risk evaluation is not possible (CWA not used for a while). It took very long to find the reason: Obviously a combination of energy saving mode and automatic background updates (in general and for the app) switched off. I think that many users won‘t search for the reason and simply deactivate the app thinking it does not work.
The app should inform the user about the reasons and guide the user exactly what to do.
Are you maybe talking about this issue? https://github.com/corona-warn-app/cwa-app-ios/issues/741
yes, this was the error message and issue (obviously known already). Thank you for the fast reaction!
Von meinem Mobiltelefon gesendet
Am 19.08.2020 um 14:55 schrieb Daniel Frey notifications@github.com:

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In the next version we also improved the help text for this issue
Most helpful comment
In the next version we also improved the help text for this issue