Sidemenu header doesn't slide


Hi there,

Since the nightly build, the header of the sidemenu doesn’t slide anymore.
Only the menu slides from right to left, but the header not. So now I can’t see the header of my sidemenu.
I’m using the following HTML and JS. I’ve posted it in codepen:

Thanks in advance.

Greetz Arjan


Does someone has a solution for this?