JSN SR40T 2.0 giving false readings in between

Hello

I bought this ultrasonic sensor which i want to use for water level sensing the issue I am having is that it is giving me these false readings on random usually 0.

My question is that I know version 2.0 of this sensor is not very stable but is getting these random 0 also a normal thing for this sensor or is it just my sensor.

I am attaching the image please refer to it aswell.

Thank you for your time.