I have had the Dyson 360 Viz Nav for less than 30 days (purchased from dyson.com) and have encountered this issue 7 times this week.
The Problem: while cleaning (scheduled or manually started) the vacuum will fully power-down without reporting an error or signalling a notification in the app of the problem. This does not happen every time but majority of the times. This may occur within the first few minutes or 20 minutes into a clean.
The app will show “Connection lost. Sorry, we can’t connect to the Dyson network right now. If the problem persists, please contact us.” The Vacuum itself shows the display fully black, which then needs to be pressed to reboot the system.
No robot activity is recorded to the app unless there was an alert during the clean. Even in those circumstances, the robot activity will return “-” as cleaning time when it powers off.
Battery is fully charged, room is well lit, very few obstructions, and firmware is up-to-date (RB03PR.01.08.005.4317). I also adjusted Lift sensitivity to Low and that has not changed anything.
I am working to get video evidence (catching it in the act of failing)