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AI Controller has no Blackboard Component in a development/shipping build

I have an AI Controller assigned to a Behavior Tree+Blackboard. In the editor everything works fine, the tree works, the AI attacks, etc.

However, when running the development or shipping version, the blackboard returns to none. That or the component itself is missing.

The messages in the log are as follows:

[2021.07.26-19.01.15:864][271]LogScript: Warning: Accessed None trying to read property Blackboard EnemyCharacter_C /Game/ThirdPersonBP/Maps/ThirdPersonExampleMap.ThirdPersonExampleMap:PersistentLevel.EnemyCharacter_2 Function /Game/ThirdPersonBP/Blueprints/Enemies/EnemyCharacter.EnemyCharacter_C:ExecuteUbergraph_EnemyCharacter:078D [2021.07.26-19.01.15:864][271]LogScript: Warning: Script call stack: Function /Game/ThirdPersonBP/Blueprints/Enemies/EnemyCharacter.EnemyCharacter_C:ReceiveBeginPlay Function /Game/ThirdPersonBP/Blueprints/Enemies/EnemyCharacter.EnemyCharacter_C:ExecuteUbergraph_EnemyCharacter

I tried googling this issue to no success. Does anyone know what could cause this?