area_entered sometimes not working

Question

Hi,
i code a simple tower defence game and I have a little problem with collisions.
I wanted to create mechanism that, if the enemy get hit by a bullet of tower, the bullet will be seek to another enemy(changing his direction to next enemy).
But for some reasons, sometimes the method: 'getoverlappingareas()' just doesn't work.

code:

func _on_Bullet_area_entered(enemy):
enemy.hit(self)
pierce -= 1

var min_dist = 9999
var the_nearest_enemy = null
print("start XXXXXXXXXXXXXXXXXXX start")
for enemy2 in AutoTargetRange.get_overlapping_areas(): # THIS NOT WORKING
    print(enemy2)
    var dist = global_position.distance_to(enemy.global_position)
    if dist < min_dist and not enemy2.got_hit_by(self):
        min_dist = dist
        the_nearest_enemy = enemy
print("end   XXXXXXXXXXXXXXXXXXX   end")
if the_nearest_enemy != null:
    look_at(the_nearest_enemy.global_position)

How it works in the practise:
https://youtu.be/LXQU9N1Q8oo

As you can see the output shows Enemys(Areas) between "start" and "stop"(always should be 4), but sometimes the enemies arent detect, despite on the video, the bullet collision overlaps with enemies.

Answer 1

I changed getoverlapingareas() to signals (areaentered, areaexited) but i got the same result.