This is still occurring unfortunately. Tested payment via Stripe test gateway (this isn't on their checkout page), emails were duplicated as well as iDevAffiliate commissions.
Tested again using Dummy gateway, no issue. So, this has something to do with the Stripe gateway causing things to be duplicated internally and executed.

Hi folks, could you please advise if we need to disable the Stripe event again? This is causing us many problems including (duplicate payments, emails, http posts, affiliate commissions etc....).
Looking forward to your response.

krileon wrote:

Did you update to latest CBSubs build release and do you have more than 1 webhook configured at Stripe going to your CBSubs install? Please be sure you only have 1 webhook configured.

Yes, CBSubs was updated following your reply. Indeed there is only 1 webhoom, confirmed.

krileon wrote:

Yes, you can disable checkout.session.completed event if you want as there's other webhooks sent that we can rely on, but this should be fixed and is in my tests. Within Stripe > Developer > Webhooks > Your_Webhook you should be able to see what webhooks were sent for a payment and can check their Response. Only 1 webhook should state "webhook process: success" as its response. This usually should be the charge.succeeded webhook.

When I submitted the test payment, it was using the Stripe Test Server with Inline Form, so in this case that is still duplicating things, it wasn't a result of the Hosted Checkout. I have the stripe test server setup exactly like the live but using the test gateway with its' cron URL of course. When viewing the stripe test server / webhook response(s), there is only one that returned webhook process: success (charge.succeeded), the other was webhook skipped: nothing to do (payment_intent.succeeded).

I can disable the checkout.session.completed event, however it doesn't seem to be a result of that provided this test using the Inline form. However, please let me know if you think I should still disable that event?