The water in my skimmer keeps draining out quite suddenly. I’ve tried slowly adjusting the valves to push through any air pockets with no luck. If I keep The skimmer valve shut then it doesn’t drain out in the water just sits there. Once I start to open the valve, once I get past a certain point, the water begins to drain out of the skimmer basket. Doesn’t appear to be any leaks anywhere , so I’m at a loss.