Now solved! The combination of reinstalling the pi gerbo in VRM and deleting database files in /data seems to have cleared the issue with a bit of delay.
Hey folks,
System overview graph has changed in my vrm portal and has now stopped logging grid import/export and started displaying solar data as a line instead of bars. I can still see all the information in real time. This is probably best illustrated by the attached screenshots. Is it a problem in my end or something to do with the portal itself?
(edit, had initially put in wrong screenshots)