Smart ato. Not working properly

I was wondering if you had any suggestions regarding my smart ato.  I have the unit hooked up to my sump. I have always had issues with the top off beeping for no reason.  The bucket of top off water will be full but the unit will randomly start beeping with a red flashing light. Or like yesterday i get home from work and noticed my return pump was making some noise. When i looked in my sump, the pump chamber was really low on water. I always make sure the side of my sump is clean. I also make sure the portion tjats inside the sump is clean. But i still run into the issue. Im getting to the point that I dont trust it.  I set up a web cam pointed at my tank just so i can make sure the return pump isnt running out of water. Its happened a couple times now, were the ato failed and i was able to see air bubbles in my display tank. Luckily i have a apex system and could use my phone to turn off the return pump before it was damaged.