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TPS61022: Device gets shorted very frequently.

Part Number: TPS61022
Other Parts Discussed in Thread: TPS2121, , BQ21040

I have used BQ21040 to charge lithium ion batteries. The batteries are also connected to TPS61022. The output of TPS61022 is connected to TPS2121.

The setup:
Battery gets discharged completely and is cut off. The input is then turned on and off in 10 sec with load connected. The device (TPS61022) short circuits connecting the input pin to ground.

Experiments:
Tried adding and removing capacitance at output and input sections with no good results.
Burned almost 20 production ICs and a few samples.