Tooltip text disappeared

I have a problem with tooltip text in the root graphical library.
When I try to see a tooltip text moving the mouse, for example, on a button, only a yellow box appears.
The text of the message seems to be lost or the same color of the background.
Gabriele Bigongiari

Hi Gabriele,

Could you tell us which version of Root, in which platform and how to reproduce the problem (I don’t see this behaviour with any Root application…)

Cheers, Bertrand.