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TPA6304-Q1: IN_REF (Pin 8) short to gnd

Part Number: TPA6304-Q1

What is the expected effect at die level in case a short to ground in pin 8 (IN_REF) for the TPA6304-Q1. In this pin, we have a RTN (Return) signal coming from a DSP. 
Or what could cause a leakage on IN_REF to DVSS?