I just had a very similar issue after a firmware upgrade with an AC-coupled system using a Fronius inverter. Now the PV inverter is not shown on dashboard which results in incorrect load data. The PV inverter is shown in the device list but not on the dashboard. Very frustrating.
Seems like Victron did not test this latest firmware with AC-coupled systems. Here’s my post from yesterday - Fronius GEN24 not showing after Cerbo GX firmware update