[Emacspeak] Cannot remap isearch-repeat-forward

[Pawel Por <porparek@xxxxxxxxx>]

Hello,
I've configured ctrl+f for isearch-forward and isearch-repeat-forward
in both emacs and emacspeak.
In emacs both combinations work well while in emacspeak only the
isearch-forward works well and isearch-repeat-forward beahaves like
expanding the search to the whole word under the cursor.
Mapping the isearch-repeat-forward to e.g. ctrl+o also works well for emacspeak.
I'm using emacspeak 53.0 in Linux Mint 23.1.
My config file looks as follows:
(global-set-key (kbd "C-e") '(lambda () (interactive) (load-file
"/usr/share/emacs/site-lisp/emacspeak/lisp/emacspeak-setup.el")
                              (defun dtk-toggle-quiet-all ()
                                (interactive)
                                (dtk-stop)
                                (dtk-toggle-quiet t))
                              (dtk-set-language "en-us")
                              (global-set-key "\C-s" 'dtk-toggle-quiet-all)
                              (define-key isearch-mode-map "\C-s"
'dtk-toggle-quiet-all)
                              (global-set-key "\C-f" 'isearch-forward)
                              (define-key isearch-mode-map "\C-f"
'isearch-repeat-forward)         ; worked in xubuntu-20.04
;                             (define-key isearch-mode-map "\C-\M-f"
'isearch-repeat-forward)
                              (global-set-key "\C-a" 'dtk-stop)
                              (global-set-key "\C-z" 'undo)))

Please help me fix the configuration.
Thank you