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Fixed

Fixed in 1.0.8

Votes

1

Found in [Package]

1.0.7

Issue ID

BEHAVB-165

Regression

No

Setting a shared blackboard variable during runtime keeps the value when exiting play mode

Package: Unity Behavior

-

Steps to reproduce:

  1. Download and open the attached project "Behavior Shared Variable Issue.zip"
  2. Open "scene"
  3. Enter play mode
  4. Observe the console (it should log the number 0)
  5. Exit play mode
  6. Enter play mode again
  7. Observe the console

Actual results: The console logs 1 indicating variables set during runtime 

Expected results: The console logs 0 as variables set during runtime should reset to their default values when exiting play mode

Reproducible with versions:
1.0.7
1.0.3

Can’t test with versions
1.0.2 (blackboard asset doesn't have the Share toggle option)

Tested on (OS): MacOS (M1) 15.1.1

Notes
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Comments (2)

  1. Mariusch

    Dec 09, 2025 21:23

    Still happens in version 1.0.13

  2. IRFM_VR

    Apr 24, 2025 09:14

    Hi, I'm facing the same issue, while working on version 1.0.9 and trying to assign a Monobehaviour class to the blackboard shared variable from a Class that sets the Blackboard variables (let's call it BlackboardVariableSetter).

    Note that I am editing a RuntimeBlackboardAsset at runtime from a Monobehaviour class (called BlackboardVariableSetter) by running the following code in the Awake() function (simplified for brievety sake, in the snippet below):

    AMonobehaviourClass newObjectValue = getNewObject();
    Unity.Behavior.BlackboardVariable bbv = processRunnersBlackboard.Blackboard.Variables[0];
    bbv.ObjectValue = newObjectValue; // for the sake of brievety, I'm neither checking name, nore type here

    The value gets set properly the first time I enter play mode. But when I quit, the values in the blackboard asset remain set. This causes an error the next time I enter play mode and try to access the blackboard shared variables.
    To make it work again, I need to manually delete all the Values of the Variables of my RuntimeBlackboardAsset in edit mode from the inspector, before entering play mode again.

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