Scroll Bar missing from Style pane in Looker Studio "Explore" UI

[skyler]

When using "Explore" on a data source, there is no scroll bar on the style pane in the interface. I've tested this from multiple accounts, across multiple data sources (BigQuery, Sheets), across multiple browsers (Chrome, Safari) and others are able to reproduce. The missing scrollbar prevents us from accessing the configurations. We know they are there because if we change the browser zoom or if we resize the window, we can see the full list.

This occurs 100% of the time and is a medium severity to our organization, making it quite difficult to Explore data sources.

Steps to reproduce:

1. Create a data source (or have an existing data source)
2. Go to Data Source and select "EXPLORE"
3. Change to the "STYLE" tab and see a missing scrollbar

Any data source should do, but here is a public Data Source based upon dummy data stored in Google Sheets: https://lookerstudio.google.com/datasources/a7ada7b6-c5b8-4d5c-8a97-abda1acf5530