Question 2 unable to accept value greater than 0

(1)    When user enters ‘0’ into the fields in Question 2, a correct
validation message is prompted. Then, user enters ‘1’ into the fields,
and tap on [Done] button, the same validation message is prompted. By
right, value greater than zero can be accepted. The same issue happens
to Person Type ‘1st Life Assured’,  ‘2nd Life Assured’ and ‘Payor’.