Limp wristing is VERY common. Grasping the shooting wrist with the supporting hand is NOT the answer. Attaining and maintaining a proper grip is the answer. You should only experience a slight muzzle rise when firing a 9mm. If it is jumping up more than 3" or so, you are limp wristing.
Grasp the grip firmly with the shooting hand. Do not try to squeeze the life out of it, this will adversely affect the trigger control. Wrap the support hand around the FRONT of the grip frame under the trigger guard. Lay the support hand thumb along the frame forward of the shooting hand thumb. Squeeze with the support hand firmly.
I have seen such malfuntions in MANY light framed pistols. Alloy or polymer frames do not have enough inertia to resist rearward motion. A steel frame tends to take care of it's self. You may think you are gripping firmly enough, but if you are getting FTF's in a Glock you ARE limp wristing.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball