The bug

Sculk sensors are not activated upon placing water in the nether.

How to reproduce

1. Go into the nether and place a sculk sensor
2. Place water next to the sculk sensor
   →  Notice how to sculk sensor does not detect the sound of the water being removed

Additional Information

I've attached a video which shows this issue. In this video, you can see that sculk sensor is not activated upon placing water in the nether.