Multiple confirmation mails sometimes [Payment Mollie]

Oc 3.0.3.8 / Mollie (latest version)

Problem I have:
Sometimes a client receives 1, sometimes 2 and sometimes 3 confirmation mails when using PSP Mollie.
I tried myself, and I can't replicate how clients get multiple mails. Each order I place (fast, of stalling for time during the PSP's payment process) I only get 1 confirmation mail.

Here is an example of the webhooks send by Mollie that triggers the system to send 3 mails:

2025-03-14 13:06:57 - Orders API: Order created : order_id - XXXXX, mollie_order_id - ord_1.jqwu8a
2025-03-14 13:07:45 - Received webhook for order : ord_1.jqwu8a
2025-03-14 13:07:45 - Webhook for order : Updated mollie payment. transaction_id - tr_v5Hus7ApFD, status - paid, order_id - XXXXX, mollie_order_id - ord_1.jqwu8a
2025-03-14 13:07:48 - Received callback for order : XXXXX
2025-03-14 13:07:48 - Updated mollie payment. transaction_id - tr_v5Hus7ApFD, status - paid, order_id - XXXXX, mollie_order_id - ord_1.jqwu8a
2025-03-14 13:07:48 - Received callback for order : XXXXX
2025-03-14 13:07:48 - Updated mollie payment. transaction_id - tr_v5Hus7ApFD, status - paid, order_id - XXXXX, mollie_order_id - ord_1.jqwu8a
2025-03-14 13:07:50 - Webhook for order : The payment was received/authorised and the order XXXXX, ord_1.jqwu8a was moved to the 'processing' status (new status ID: 2).
2025-03-14 13:07:57 - Success redirect to success page for order - XXXXX, ord_1.jqwu8a
2025-03-14 13:07:58 - Success redirect to success page for order - XXXXX, ord_1.jqwu8a

I get the fact that OC sends an email when the order is added, and I get that it sends one when it receives the payment succesfull trigger.

What I don't get is that when I place an order myself and pay for it, I only get 1 email notification (succesfull paid order) but most of my clients get multiple mails going through the same process.

From what I can tell...Mollie has send 3 identical webhooks after eachother on this transaction. Am I wright that this is a 'fault' in the Mollie process?
I did ask the question also on the Mollie github page.

Cue4cheap wrote: ↑

Sat Mar 15, 2025 12:37 pm

viewtopic.php?t=234867

Saw and read that topic, but it seems another problem as the one I am having: that Mollie sends duplicate updates.

I just want to understand if there is a reason why mollie is sending duplicate updates, or that it is indeed a bug.

If I do not get any reply from the developer on the github site I will have to find another way to deal with it.