[#6538] Paid basket was automatically deleted

Yes, they were purchased at the same time. Attached is a screen shot of the payment entry, where everything is correct.
No, I could not find any trace for a newly generated basket.

What is really strange that it's "system" that does it all, including creating the merchandises and so on.

1. Do you have a custom plugin or code, or any auto-actions ?
2. What's your basket timeout set in CBSubs > Settings > Display > Baskets ?
3. Do you have any entries which are not "system" in the history logs ?
4. If all of the above questions don't help to find what's wrong, we would need to have access to review settings and installed add-ons (to give access, you can use Private Messaging, see our signatures)

Please note that this seems to be an exceptional case, normally everything works fine. I was just trying to track down how this basket got deleted.

I looked into the code and there is a 30 min basket delete limit in
function getInstanceBasketOfUser() in cbpaidPaymentBasket.php
and this is called by
function createSubscriptionsAndPayment() in cbpaidControllerOrder.php.

So, couldn't it be that this is somehow called if there are more than 30 minutes before the paypal payment is finalized?

To answer your questions:
1) Yes, I have both custom plugin and plenty of auto-actions.
2) My basket timeout is 720 hours.
3) Yes, plenty, normaly there is the username there. "System" it says for new users with ID 0.
4) No problem, you could have access to the system.

I looked into the code and there is a 30 min basket delete limit in
function getInstanceBasketOfUser() in cbpaidPaymentBasket.php
and this is called by
function createSubscriptionsAndPayment() in cbpaidControllerOrder.php.

So, couldn't it be that this is somehow called if there are more than 30 minutes before the paypal payment is finalized?

That is likely the cause. That's a hardcoded basket expiration case. It should be using your parameter value, which at minimum is 1 hour. Have added a bug ticket to fix this to respect the parameter value.

#6538

I think this only occurs when the User ID is 0 and the username "System".

Do you think it will be fixed with the next nightly?

System is what it logs as when the System performs the action. In this case when it expires a basket it's logged as deleted by System.

Do you think it will be fixed with the next nightly?

Probably, I've already submitted an MR for review and merge.