Gpio irq issue


I am working with kernel version 5.10.41 on HiFive unleashed Board.

when testing Gpio irq, interrupt is occurring only once i,e requested IRQ on gpio pin, and written handler for it. pulling down the gpio pin to ground on HiFive unleashed board.
when verifying Gpio irq interrupt observed that the IRQs could not trigger multiple times.

It is also observed that the same issue persists in kernel versions 5.12.x and 5.13.x.

can anyone please help me to resolve this issue.