AEM form rule editor no scroll bar ?

Hi,

I am trying to add some rule in adaptive form rule editor. But if the rules are little bigger then the focus is our of the screen and no scroll bar to access/view that. If one line code is big then no horizontal scroll bar is there. Its not big issue as still we can get all code while editing. But if code is lengthy then vertical scroll bar is not coming. Which makes other rules below non accessible for editing. Refer screenshot for better understanding.

Screenshot :