I have a bug on my forum with subscriptions..
An user had canceled his monthly subscription and his status was not updated.
The first paiement was the 21 december
The second was the 21 january
And he has stopped his subscription the 19 february. So the third paiement was not done, and his subscription was not expirated on my admin panel.
I had to manually cancel his subscription today because he was always premium..
On my logs I have in 19 february this line :
Action: Information: No txn_id. No action to take.