Transient sub-prefixes do not return to parent

[ErikPrantare]

Setup code:

(transient-define-prefix my/parent ()
  [("p" "Call child" my/child :transient t)])

(transient-define-prefix my/child ()
  [("c" "Invoke suffix" my/suffix)])

(defun my/suffix ()
  (interactive)
  (message "Invoked from child"))

Running my/parent, I expect p c to return to my/parent.
Instead, It stays at my/child.

The expected behavior occurs on older transient versions. The
erroneous behavior occurs on a colleagues machine as well, and he uses
a newer version.

• M-x magit-version RET

Magit 4.2.0, Transient 0.8.2, Forge 0.4.6, Git 2.48.1, Emacs 29.4, gnu/linux

[tarsius]

Thanks for the report. I can confirm.

I also already know what's going on and when it happened. And how to fix by banging on it some more; but I haven't come up with a clean fix yet (I might actually be able to drop some misguided code).

Oh, and as a temporary workaround, you can use :transient return on the suffix in the subprefix.