It sounds like a firmware/software "feature", and probably not something you can do much about at the boiler end other than set it up fixed temp at 190F without reset control when you know it's going to be that cold.
Mind you, 0F is fully 15F below your 99% outside design temp, so whether it's worth doing anything to be able to meet the load with 180F water @ 0F depends.
Turning on some space heaters to manage this 99.99% percentile condition a few hours per decade is probably a lot cheaper than adding more radiation, but still more expensive than just going off outdoor reset for any night they are predicting low single digit temps.
There may be ways to lower the heat load in at least the rooms you care about so that it'll keep up too, but probably not super-cheap either.
Those are probably the extent of your options, unless Burnham has a firmware upgrade for the controls.