SQA - sandbox in-app purchase restore failed

app purchase from testFlight app. i want to purchase a Subscription. i can purchase Subscription using sandbox account but when i'm trying to restore it failed.

device info:

iPhone 6s

iOS 13.6

here is my video - https://drive.google.com/file/d/16q5KKvdiWydTQczVKWVR7RRCQoLC7GF6/view?usp=sharing