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TPS2121EVM-023: Output drops to zero and stays zero when the input is switching

Part Number: TPS2121EVM-023
Other Parts Discussed in Thread: TPS2121


I am using TPS2121 EVM board to test my use case and the resistor change is listed below. When there is no load at the output the switchover seems working fine and no problem at all. 

The issue I am seeing is when the load is connected. I have connected 20V from the dual power supply to inputs of the EVM and on board load is enabled by installing J20 Jumper (2A load). Both inputs are ON and the input-1 is connected to output due to  the resistor settings. When I remove the input-1 the output become zero but input-2 is still 20V.  I am not sure why the output is become zero. Is this due to inrush current? The current limit set to 4.6A by shorting JP3 1&2 pins. why I am not seeing this issue in no load.

R9 - 130k

R15 - 10k

R3 - 210k

R14 - 10k

R12 - 150k

R17 - 10k

R6 - 210k

R13 - 10k