Extrapolate the ugly graph to 42% (64.2/150) charge or 92A.
There should be no constant current time, immediate abs @ 50% Soc
My point is the battery was extremely discharged. yes, less friction also.
So if ya shift the 14.4v charge curve 30 mins to the left ya find that 55-64 A @ 14.4v (with less friction) compares to 25-30A @ 13.6v @50% DOD/Soc
If ya want to charge @14.4v ya need a charger that will do 14.4v on demand, not having to load up the batts with an inverter load before starting the charger to trick it.
Sunshine mitigates this when it is sunny.
