I noticed this today (yesterday's data) but looking back it seems to be fairly consistent. Each time I hit a FD period, the PV drops to around 140W (from an expected 2.7-3.3kW on yesterday's figures) with pretty much all the export and load coming from the battery. Apart from anything else, that's over £1 revenue lost each day (first world problems, I know).
Is this a known firmware issue? I've tried updating a couple of times today but each time hit a timeout at 72% with the inverter disappearing from the app/web (although front panel suggested everything was normal) and needing a full power down & restart to reappear.