Owen, I also just came across this unexpected behaviour. A nasty surprise indeed that severely disrupts the flow of our complex Story Map which contains cascades as main stage content in a journal parent story map. Reading you comment you specifically mention " technical limitations with the Safari browser" but I have since installed Firefox, Chrome, and Edge on an iPad to try to work around the problem and they all exhibit the same problem. Can you confirm that this is a platform specific problem affecting all browsers on IOS rather than a specific Safari issue and the only solution is to use Android (confirmed working on my Android phone). It seems very odd that the platform affects the rendering of all browsers using their own engines. Thanks.
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