BB10 – menu not working

For my site, on Blackberry 10 devices, the hamburger menu has become completely unresponsive.
All else seems to work properly.
I have another site using the same theme using fewer plugins, with the same issue only on BB.
I’m sure it functioned properly (BB Leap and Priv) a month ago.
Some theme/plugin updates since, though, and didn’t catch it.
Currently works on Android, Apple, PC (adjusting window size).
That’s all I know, sorry doesn’t seem like much to give you.
Sure love the theme, so any help would be appreciates.

The page I need help with: [log in to see the link]