I have noticed that, since upgrading my CCGX firmware from 2.34 to 2.42, my system now regulates the battery voltage approximately 0.3V higher than before. My system consists of a MPPT150-70, Multiplus-II (48V, 3kVA), CCGX, BMV712 and BlueNova 52V 12kWh Lithium battery.
My Lithium battery requires an float voltage of 55.5V, and since the CCGX firmware update, the system has been regulating the float voltage at 55.8V. I have double-checked that the Float Voltage setting in VE-Config is still set to 55.5V.
It appears that the system is now using the lower-accuracy "VE.Bus System  Voltage" for voltage measurement instead of the "Solar Charger " voltage or the more-accurate BMV712. Note that I have configured the BMV712 as the "Battery Monitor" in the system.