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LTC3729 model does not discharge RUN/SS cap

Category: Software
Product Number: LTC3729
Software Version: 17.1.10

The LTC3729 datasheet states that the if the output voltage falls below 70% then the RUN/SS pin will start discharge the softstart cap.  I do not see this occur in the model when I apply a heavy step load to the output.  The Run/SS pin never discharges even though I'm in a current limit and voltage has folded back well below 70%.  I'm trying to better understand how this behaves to balance softstart time vs not latching off, but the model does not appear to work properly.