bug#43672: 28.0.50; select-frame-set-input-focus does not set focus first time called

[martin rudalics]

> I am sorry för the confusion, I was just to fast typing. Yes, you
> understand me correctly. It works correctly in emacsclient; not
> correctly when I run Emacs as a standalone process, either with -Q
> flag or without.

Then please with emacs -Q try the simpler

(defvar child-frame nil)

(defun make-child-frame ()
  (interactive)
  (setq child-frame
    (make-frame `((parent-frame . ,(selected-frame))
              (left . 10)
              (top . 10)
              (width . 20)
              (height . 10))))
  (select-frame-set-input-focus child-frame))

(defun delete-child-frame ()
  (interactive)
  (delete-frame child-frame))

and tell us whether the child frame gets focus.

martin