There was no notification neither for the falling goldbox, nor about who took it (Rio map).
I was playing on low resolution (1024x768), and maybe there wasn't enough space for the text to appear.
The notification now appears in the log on the right side of the screen, but only when the screen resolution is sufficiently big (bigger than 1024x768).
We will look over this inconvenience. Thanks!
I recommend that you use resolutions over 750k pixels.
Customer support service by UserEcho