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Did robot have this issue in the second cleaning?
The dock location on map is correctly right?
Would you pls send us that history map for reference? See pic below
Not shown on the map is the path it took back to the dock. This was the last cleaning it recorded that day. While it was navigating back to the dock it showed a new map (i.e. not this path), but did not save it. It bounced around the Bedroom (where it started from after being moved), then the Open Room, then the Hallway and then eventually worked its way back to the dock, which is in the correct location on the map. As I said originally, the entire time it was bouncing around randomly it was represented on the map in exactly the place it actually was, so it knew where it was.
I had forgotten that on this run it did grab a running shoe from a closet that should have been closed and dragged that to another room where it managed to get it caught in front of one of the sensors so ended up circling in place. I was able to remove the shoe without having to move the robot. After that it finished that room, then got stuck behind an upturned carpet edge that I ended up having to lift it over.
Use wet cloth to clean the wall sensor and cliff sensors.
Also, you can set no go zone or invisible wall over the carpet area in case the robot gets stuck.
Now that I know it has trouble crossing that carpet, I just keep it out of that room. It was able to cross it the first couple times, but clearly a cat or something has rolled up the edge. Once we replace the carpet I'll be able to put it back in the schedule.
I don't think it's a sensor issue. I've only had the vacuum for a few weeks, and prior to and since this incident it has no trouble at all with navigation and obstacle detection. And even during the incident it knew exactly where it was. It just for some reason decided to ignore that and bounce around randomly. Possibly a bug, or an overly-aggressive position recovery procedure.
As I noted originally, a simple "confirm location" option in the app would probably solve it. i.e. if the robot gets into a situation where it isn't confident of its position, the app could offer the user the option of confirming that the robot is in fact in the physical location indicated on the map.