The MAX17250 is not suggested to be used with common VLs connected together between two systems with single capacitor connected across VL pin to ground.
Bypass capacitors are used to stabilize LDO's, and any voltage variations between the two systems VL could create a problem, where one VL might act as source and other VL as sink.
VL value variations will be different based on operating conditions.
Iset has logic integrated with VL, and different values of Iset, and connecting VL of two different systems together could cause trouble with the output voltage and peak current selection.