I've noticed this as well, I believe it is due to the overall anhydrous nature of most of the ingredients, Mag and Cal especially.
The first bucket I received before it went on the market wasn't even close to what I'm experiencing now, however, it seems to be going into solution rapidly.
The first bucket I received before it went on the market wasn't even close to what I'm experiencing now, however, it seems to be going into solution rapidly.