There is an issue when using self references with functions as an input. With pass by references on a function, the input has it checked by default; however, a self reference can still be hooked in and compile with no issue. This can lead to a crash, for which the callstack has been added for this issue. This issue is similar to
UE-40861 but with a function instead of a custom event.
There is a current workaround for this issue, simply unchecking and rechecking the pass by reference box updates the nodes and produces the expected behavior. However, the user should be getting an error from the node's creation.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-45270 in the post.