Title says it really. I have two batteries that usually show up in the dashboard but just now only one is visible. It looks like it is working although one definitely has a lower charge judging by the lights.
Probably a coincidence but my smart meter also suggests I have imported overnight more from the grid in the last 3-4 days than is usual.
So not sure if there is an issue with the battery, the connections etc., or is it just a software issue with the mobile app...