I am seeing this crashes in 15.5 version, I am using flutter code base seeing like this and dlyd issues many crashes

Apple pay for one particular user with 15.4.1 unable to go through with our app but is working in other app. Apple pay token and then error shows on Apple pay sheet it shows as payment declined. Device region is UK and he have SA region mada card. Same safari it is working for him. merchant id for extra.