Problem solved in version 2.72
Cerbo running fw. 2.71
BMV-712, fw. 4.05
2 x SmartSolar MPPT VE.Can 150/100 rev2, fw. 3.05
Multiplus 12/3000/120-50 fw. 482
OPzS Solar 1520 Lead Acid (Lithium is not an option in a wood-fired home that gets below -20 deg. C when left for some days in winter!).
DVCC = Yes, VRM two-way com. = Yes.
After updating Cerbo to version 2.71 the MPPT device history only shows data in the field 'Today'. The field 'Yesterday' is there, but without any data! This have been the situation for three days now. Rebooting equipment didn't help.
Downgrading to fw. 2.66 immediately resulted in data in the field 'Yesterday'