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TPS65910 INT1 not asserted

Other Parts Discussed in Thread: AM3354, TPS65910, AM3359

We are using the TPS65910A31A1RSLR PMIC along with AM3354 processor in our design. We use a Push button to Turn ON and Turn OFF of the board.
When Push button is pressed, the PMIC is supposed to give Active Low signal on INT1 pin as per the datasheet. Then by reading respective Status reg in PMIC
the shutdown/sleep action is taken.

However in our board when the Push button is pressed there is no INT1 active low signal from PMIC.

PWRON is kept low for more than 1 sec and tried till 8 sec (after 8sec TPS65910 shuts down) but the INT1 pin is always HIGH. However the PWRON_IT bit is set to 1 when button is pressed >3 to 4 sec. This helps us to confirm that PMIC is detecting the button press and it update the status register. Note: INT_MSK_REG register also verified and it is at its reset state. That is none of interrupt is masked.

We tried clearing the Interrupt status register (INT_STS_REG at 0x50 address) by writing 0xFF and also verified that it is cleared. After the register is cleared, the PMIC automatically asserts the INT1 pin LOW, i.e. there is a pulse(low) for 1 usec.

But the INT1 pulse does not occur when the push button is pressed. Please let us know your suggestions.