iOS update (13.4.1) causes issue with sidebar shadow

Hello one of my team has just updated their iPad to the latest iOS (13.4.1), and we are now seeing a vertical black bar down the right side of the sidebar. On desktop browsers, iPads that have not run the latest update, and on my Android device there is still a gradient/shadow there, but on any course (new or old) that we look at on the updated iPad, we see the black bar. (see attached image below). Is anyone else having this issue? Is this something that the Rise coders could look into? 

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