Moisture between vapor barrier and new aqua board
I recently had my tub surround redone do to a leaking shower pull assembly, about 6 weeks ago we noticed cracking and holes in grout lines and moisture coming out under the tub, we opened up a kitchen wall behind the new tile and there is moisture between the vapor barrier and the backside of the aqua board. The original tub surround only had vapor barrier and insulation part way down as it is a split level and the bathroom wall joins my kitchen wall about 4 feet down. Could the moisture be condensation from the hot showers?? what would cause this to happen?