GameObject.FindGameObjectsWithTag is Finding Objects On Preview Scene

Hello everyone, i prepared a wave controller script. When GameObject.FindGameObjectsWithTag.Length.("Enemy") <= 0, wave works. But, there is a problem. Although scene has only 6 enemies, GameObject.FindGameObjectsWithTag.Length.("Enemy") is equal to 16. I killed 6 enemies and there is no enemies in scene but GameObject.FindGameObjectsWithTag.Length.("Enemy") is equal to 10 enemies. 10 enemies are in previes scene. I want GameObject.FindGameObjectsWithTag find tags on only scene. Not preview scene. How can i do?

 

Why i don't have a .Length method in GameObject.FindGameObjectsWithTag ?
For the better answer, you need to put the code.But if you want to calculate the enemies you killed, you can create a variable : when kill ( Destroy ) EnemyKilled variable ++ and when you start a new scene or new level you can set it to zero in the Start function.

 

For example; When GameObject.FindGameObjectsWithTag ("Enemy").Length <= 2, next wave is coming. But although scene has only 2 enemies, GameObject.FindGameObjectsWithTag.Length.("Enemy") is equal to 12. So, next wave is not coming. I restarted unity and this problem fixed. It no longer counts on preview scene. But i do not understand. Is this a bug?

Code (CSharp):

1.     if (GameObject.FindGameObjectsWithTag ("Enemy").Length <= 2) {
2.                 StartCoroutine ( SpawnWave ( Waves[waveIndex] ) );
3.             return;
4.             }    

 

Sometimes programs get weird bug like this !