Get multiple duplicate submissions and emails (4x)

Add the essential steps to build a reproduction.

I saw on Slack that this is a continuation of an older issue.

Yeah sorry I created this at the end of my day so I wouldn't forget.

Are the webform_protected_downloads and PDF intrinsic to the bug reproduction, or can we leave them out of this?

Great point! I just tested with much simpler reproduction steps.

Paragraphs is not needed either.

I think each reference layer duplicates the response.

Webform reference on node = 2 emails
Webform reference on paragraph on node = 4 emails

I can confirm this issue is still happening and also occurs with the "Modal" setting for form confirmation.
The "Message" setting however does not have this issue.

Also: I could reproduce this without any handlers added to the form.

I can confirm this issue is still happening and also occurs with the "Modal" and "Inline" setting for form confirmation. The "Message" setting does not seem to have this issue.

The issue still exists when using a webform as an entity reference field in a paragraph or node. Changing to "Message" from "Confirmation Type" does resolve the issue, but the issue should be fixed for all scenarios.

Using AJAX also suppresses the issue, and no multiple submissions in that case as well.