Looks like the Shadow presets dropdown has disappeared from the container element. It only appears at first-level containers, but not in nested ones. The "edit in style kits" button is there, but the dropdown to select the actual presets dropdown is missing.

Demonstration

Here is the problem in action:

https://www.loom.com/share/e5a586ba45074392ae64593173f35b00?sid=bece0bc1-ef3f-4d31-8e0d-f28ec9064198