Powermail form with ajaxSubmit enabled with confirmation page and redirect set in powermail flexform, gets submitted multiple times

[psyph3r]

On a clean TYPO3 v11.5.28 installation with Powermail v10.7.3 installed we have a single-step form with the following key settings enabled:

• Ajax submit option is turned on (plugin.tx_powermail.settings.misc.ajaxSubmit = 1)
• Confirmation page option is enabled in powermail flexform.
• Page redirect to a "thank you" page is set up in powermail flexform

The above combination results in multiple submissions both in the database and outgoing emails. When we turn off any one of the above options, it behaves correctly. We have no custom JavaScript event handlers set on the form submit event or on the submit button.

This issue is very similar to the one reported by elmarputz in issue #211 in powermail v4.3.2 except there it wasn't clear if a confirmation page was involved.

[mehdichaouch]

Hello I experience the same bug on my side with :

• TYPO3 v12.4.10 (latest)
• Powermail v12.1.0 (latest)

If you need my help to test a patch, let me know.

Best

[SZChimp]

We also experience duplicate submissions and outgoing emails on our installation. Not on every submission, but it's possible to send multiple times by clicking the submit button quickly. Though, we do not use plugin.tx_powermail.settings.misc.ajaxSubmit = 1. We also have a redirect after submission set in flexform.

TYPO3 Version: 11.5.36 Powermail Version: 10.7.4