I've checked your site and found that you are using Paypal payment method.
In case of further recurring payments done on paypal end itself and paypal will send notification on notify url when payment updated.
According to notification subscription will get updated in PayPlans.
Can you please confirm payment completed on paypal end or not ?
Have checked Paypal sandbox account records, there is not any notification about an automated recurring record.
I don't know why....
The attachment is about my sandbox account records...
I've checked your site and found that yesterday one payment notification came from paypal but payment is in pending state.
pending payment reason is intl.
see attached screenshot.
According to that payment reason it seems you need to approve payment manually from your merchant account.
For further information , you can contact to paypal team also.