[AI] [Behavior Tree] BT task get skipped after Stop&Restart Logic

Development Programming & Scripting AI
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Setup:

  • Two NPCs: A and B.

  • Behavior Tree branch (for both NPCs):

    • Sequence with a top decorator: Blackboard condition, Notify On Result Change, Observer Aborts = Lower Priority. All other decorator in this branch has none abort.

    • Inside Sequence:

      1. Task T. Task T stops/restarts logic on another NPC (do something,StopLogic(), RestartLogic(), do something).

      2. Next Task.

Process:

  1. NPC A runs the branch, executes T on NPC B → everything works, the Sequence continues to the Next Task.

  2. Later, NPC B runs the same branch to affect another NPC. T runs and succeeds (FinishExecute(true)), but the Next Task and following tasks in the Sequence is skipped (ReceiveExecuteAI never fires).

There’s no BB key changes happen during this process, get rid of the Stop&Restart Logic did solve this problem, any idea what’s going on?