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LM74202-Q1: power drop recovery

Part Number: LM74202-Q1
Other Parts Discussed in Thread: TPS25980, TPS25947

the circuit below when the input voltage drops to about 7 volts from 12 and returns to 12v the output voltage stays around 3.3V.  This is not expected behavior.  what can cause this to happen? Attached are picture showing the normal and abnormal waveforms and the schematic.

top input V bottom output V top input V bottom Output V