Check for a crack in the tank and all of the bolts and nuts inside the bottom of the water tank there is a black rubber gasket that goes into the bolt slot find out if it is torn if not check the tightness of the bolts they should be just a little more than hand tight if there is any looser than hand tight then that is most likely the problem.
What band is that toilet?
You ought to call Lowe's and see what the issue is. I hope everything works out. Not a good way to wake up!
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