DOSBox keymapper not working

[FedeKrum]

Hi

I have been using DOSBox on my Mac and when I try to make a keymap by pressing ALT-F1, I get to the following screen :

With it, I can re-map joystick events as key pressings.

The problem comes when I do the same on DOSBox on Recalbox.
I get the following screen and cannot exit it as the exit button is not visible.

My conf file on that specific ROM is this:
https://pastebin.com/raw/pEdhHqWQ

Any idea on how to fix this issue?
Thanks

[midiwidi]

@FedeKrum you posted that question a fair while ago. I have exactly the same problem. Have you found any solution?
I remember that the keymapper worked flawlessly in earlier versions of Recalbox.