I just had to deal with it myself. After all I found this method most easy and useful.
Just add
overflow-x: hidden;
To your outer parent. In my case it looks like this:
You have to use overflow-x
because if you use simply use overflow
you disable the vertical scrolling too, namely overflow-y
If the vertical scrolling is still disabled you can enable it explicitly with:
overflow-y: scroll;
I know its somewhat not a proper way because if everything was setup well one would not have to use this quick and dirty method.