The delivery window has been changed suddenly for some customers, what’s the issue? (They didn’t change the delivery window from the mobile app, neither did the merchant from the dashboard)

This is caused when the suborders location gets changed weather by the customer or the merchant

for example, if the customer locations was in Zone A when he first created the subscription, and Zone A has this delivery window (7 AM. - 12 PM.)
then later he changed the location for some of/all of the suborders to be in Zone B, and Zone B has this delivery window (1 PM. - 6PM.)

then the delivery window would be switched from  (7 AM. - 12 PM.) to (1 PM. - 6PM.) automatically