tx_form confirmation finisher has no id
I'm using the new form in 8.7 with a confirmation-finisher, and the form somewhere on bottom of the page.
form-pages and summary-page work fine with the formidentifier as an anchor, but when it comes to the confirmation-finisher, the confirmation-message is just displayed like it is, inside the content-element-frame, and the formidentifier-id is gone.
Call me blind, but I can't even find, in which template I can adjust this.
I need the anchor, please!
with the best regards,