Does selection of Internal Voltage Reference work with Debug Simulator on SAB 80C537?

As you might know the 80c537 is capable to select the internal voltage reference by writing into DAPR where the higher nibble selects VintREF and the lower VintGND
I tried this with the eval version of A51 7.03 and its just converting in the standard range(Vintgnd=0v, Vintref=5V)

I used an external SFR definition library but since the conversion gets started this shouldn't be the problem.
Someone knows a solution/ got the same problem?

thx in advance

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