Kinesiology, ugh, I have to think that your brew is too hot. I see it's in a cooler but it's full of water, so eventually it all get to the same temperature. In the cooler is ok, with some water is ok, but only a couple of inches ! Then an old tee shirt to wick up and evaporate off taking the heat with it.
I see the wire in the back right, is that a heater in there?
If you see foaming like this the solution is to get the temperature down, your solution of putting it in water I think you will find kept the temperature up.