BP Delegate input types

I selected a handful of BP nodes, right-clicked, and chose “Collapse to Function”. Those nodes included two event delegates which I hooked up, as shown in the first attached screenshot.

I then attached custom event to those delegates when I call that function, as shown in the second attached screenshot.

Unfortunately, after saving and then closing Unreal Engine, the engine crashes whenever I attempt to relaunch it (not sure if it’s related or not).

I’ve attempted to simply recreate the function manually (instead of using the “Collapse to Function”) to see if doing it this way would work, but there is no option to select “Delegate” as a function input.

Is there a way to get “Delegate” as one of the input types, or is this something that shouldn’t have even been possible as an input type?