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.