Toolbar stops working after using overview button

[mfmcc1]

When enabling the overview button in the toolbar, it works in the first instance, but when returning to full slide view, the toolbar is no longer accessible and requires a screen refresh to be accessible again. Have tested in chrome, firefox and safari.

[ThierryNapspirit]

I have the same issue, which seems to be linked to a z-index bug. I have fixed it with a simple CSS instruction:

.reveal .reveal-toolbar {
    z-index: 1000;
}