. is undefined (when pressing C-.): is ssh behaving odd?

[Luca Ferrari]

Hi all,
I'm trying to get embark to work with a very simple setup, that is:

(use-package embark
  :ensure t

  :bind
  (("C-." . embark-act)         ;; pick some comfortable binding
   ("M-." . embark-dwim)        ;; good alternative: M-.
   ("C-h B" . embark-bindings)) ;; alternative for `describe-bindings'

  :init
  (setq prefix-help-command #'embark-prefix-help-command)  )


So far, so good, if I do M-x embark I can see that is bound to C-. as expected.
But when I press C-. I got ". is undefined".
I'm using emacs thru ssh, if that matters, which I suspect is
something that6 is going to handle C, even if C-x C-f (as an example)
works as expected.
Remapping C-. to M-. makes emabrk-act to work, so is something related
to C, but why is not showing up with other C-based commands?

Thanks,
Luca