Hitting from Hard (or Wet) Bunker
If the bunker is little wet after rain or has hard or heavy sand, it makes bunker shots harder to hit.
Because the sand wedge bounces off the hard sand, you tend to hit the ball and shoot it over the green.
Sand wedge has a bounce on the sole. This bounce will prevent the clubhead to dig too much into the sand. So it helps you get the ball out of the sand.
But if the sand it too heavy or wet, the clubhead will bounce off the hard sand.
Because wet sand or hard sand has lots of resistance, you don't want to use too much of your bounce on your sand wedge.
To do that, try not to open your face too much at address. If you usually open your face 45 degrees, try something like 20 degrees or so.
Or you can set up square to the target.
Also, try not to take too much sand. Aim 1 inch behind the ball and try to slide your clubhead under the ball.