For now I’m just using the Move Directly to and that aborts properly.
EDIT!!!: Recently I ran into an issue that prevented me from using the Move directly toward task https://answers.unrealengine.com/questions/677843/add-impulse-not-working-on-ai-that-uses-the-move-d.html.
Forcing me to find an actual solution to this original problem and that I did.
So turns out folks, you see that “Lock All Logic” boolean on the “Move to Location or Actor” node? Un-checking that solved my issue entirely and the Abort event now fires like normal when the BT tells it to.