When making the script window ‘full screen’ and then back to normal, automation frame is not reponsive any more, and extends right beyond the frame.
When the script window is at ‘full screen’, then its covering the whole device screen instead of only the browser window. This makes anything else like other windows or information needed in order to work with the script, inaccessible and thus the full screen has essentially very little use.
See how Discourse handles full screen correctly: it stays in the browser window. You can still access other windows or apps.