String can still be duplicated using tripwire hooks

 

What I expected to happen was...:
The Water broken the string and the string isn't be more

What actually happened was...:
The water can't broken the string and the string be more

Steps to Reproduce:
1. Make a structure like the photo
2. Use Debug Stick to make disarmed = true
3. Use the lever

 

And the other is the other picture

1.Make a structure similar the picture

2.make the water to the string

3.You can see the three tripwires become four strings