Missing the last transaction

The user made the initial purchase on May 14th, 2018. It's a 1 month auto-renewable subscription.


On July 4th, 2018, everything was OK. He got 2 transactions :

14/06/2018 09:40:37
14/05/2018 09:40:37


But since July 5th, 2018, he only get 1 transaction and I really don't get why. The user didn't change anything ! Any idea ? Why does the last transaction is not returned anymore ?

14/05/2018 09:40:37


Note : the user's subscription is still active in his Apple account and "will be automatically renewed on July 14th, 2018".