I own a 75/15, on the latest firmware, on the victron connect app I have my batteries set in the advanced section to the manufacturers recommended voltage levels, I have (and have since purchase) float voltage set to 13.70 volts, the app had always shown the controller when in float mode holding the batteries at 13.5v.
The firmware update before 1.46 corrected this and float was working as I'd set at 13.7v.
The 1.46 update has now undone this fix and through the app I'm now seeing less voltage than set in float, I can set the voltage in the app to 13.87 to get the float voltage to hold at 13.7v.