Closed b2zer closed 1 year ago
b2zer
commented
1 year ago Update: Now the notification arrived on the LG V20, too. Continuously from 29th December to 2nd of January (including) for every day. Still weird, but maybe it is my neighbor after all, then - and they only submitted the positive test to warn everybody after 11 pm today (previously the latest update for LG V20), but before 1 pm? Maybe it's not a bug after all, then, if such a delayed warning is possible.
larswmh
commented
1 year ago Thanks for your report @b2zer. We have created an internal ticket for it and will raise this topic internally. Internal Tracking ID: EXPOSUREAPP-14528
Corona-Warn-App Open Source Team
larswmh
commented
1 year ago @b2zer
According to internal feedback, such a delayed warning is possible. This is due to the fact that the two phones can download the exposure keys at different times. Because of this, this cannot be considered a bug, like you suggested in your most recent comment.
Feel free to comment again if you have any further questions. If you consider this to be solved, please close the issue.
Technical details
Describe the bug
I have received a notification for a "red tile" / increased risk today (January 3rd, 2023) for my CATS61. The notification was sent to my smartwatch "as configured" (despite I haven't opened the cwa-app in weeks; guess authorization is not automatically revoked, which is good!).
The app shows a total of FOUR increased risk / red contact days: Jan. 1, Jan 2, Fri 30 Dec 22, Thu Dec 29. No warning for Saturday 31st.
I only received a warning today. As the warning was sent "as configured" to my smartwatch including vibration, I am confident that I did not merely miss the previous warnings.
Now what makes it special is that my LG V20, located somewhere in the same room of my one-room-apartment (though not necessarily always at the same location), still has a GREEN "no exposures" tile.
Both phones always have bluetooth enabled, location on, and are connected to my Wifi router.
I did not leave the house / my appartment (neither with nor without the phone(s)) since before the xmas-holidays (nor did I have any visitors, and I live alone). Also, I live in the second story of an apartment building. Neither phone has a direct "line of sight" (of signal) through a window for more than a few seconds a day (when I carry them to the PC or elsewhere).
In a similar scenario maybe a year ago, where I did not leave the house either (I work from home 100%), both the phones reported a red tile of exposure risk at roughly the same time (slightly offset but what I assume to be "update with server" interval related) -> I assumed "ah-okay, my neighbor has Covid".
So, despite using both phones for different purposes, and one phone might be near the TV or the bed while the other is in front of me when I'm on the computer [when working there, but it usually also stays there all day out of habit], they're in the same room and as can be expected, detected the same (?) neighbor as a risk contact previously.
Now there is a gross discrepancy between the phones, and a total of FOUR (!) risk contact days on the CAT S61, at a time that PCR confirmed infection is likely "a very rare occurrence".
LG V20 cwa says updated today 11:01 am, CAT S61 says updated today 1:14 pm.
As far as I am aware, the cwa does not use any external bluetooth, even if available (at least I imagine this to mess with signal strength vs. distance in such unpredictable ways, I cannot imagine this is implemented in the app, if at all possible via the google API).
Just in case: The smartwatch is only connected to my CAT S61, and I wear it 24/7 (while I don't actually take my phone(s) to the restroom or the kitchen with me, believe it or not!).
I am thus assuming, due to all of the above, that this might actually be a bug.
Steps to reproduce the issue
Expected behaviour
Both phones or none of them reporting a "risk contact" with - presumably - a neighbor through a wall, especially as four contacts on four different days reported.
Additional context
I have adb installed on my desktop. If I can do anything to help (if this seems relevant), just "say the command" you want me to execute, and I'll send some logs, if applicable.
Internal Tracking ID: EXPOSUREAPP-14528