Bioluminescence’s workaround worked for me! It’s frustrating to not be able to use the constructor, but I don’t really have the time to try to narrow down the exact cause of the initial crash. Similar to Bio’s situation, the problem seems to be related to some kind of interaction between AddChildActor and Enums (or possibly structs). In my particular case, implementing structs and enums in the Child Actor’s graph is what seems to cause the problem.
This screenshot shows the BP where the child actor is being set. These are the only nodes in my CharacterBase entire graph.