The Edit functionality worked fine for my co-worker up until a certain point yesterday. I created the app and it still works for me but whenever my research assistant clicks edit button in the instant app the sidebar goes blank.
I thought it may be their machine but we reproduced it when they logged into AGOL on my computer.
They tried editing in Map Viewer version of the map feeding the Instant App and the same thing happened. The Edit sidebar in the map goes blank. The map and editing works fine in Classic Viewer, however.
May be a bug? Something to do with creator vs editor user types?

