Are any AI related components "global"?

Hello, I have my own Enemy blueprint, EnemyAIController, EnemyBT, and EnemyBlackboard.
It works great, Enemy detects player, controller sets variables in blackboard, BT reads those variables and follows player.
Things get weird when I copypaste second enemy. Now, AI can’t “loose” player, behavior tree flickers, and even if “playerDetected” variable has one way setter (can be set to true, but not false) it somehow sets to false xD