This is a real issue that can be easy to deal with. I am surprised you did not receive more serious answers.
Playing pool is more like shooting a rifle than it is like playing tennis. Therefore, the player needs to learn to place their weight on their heels like a pistol shooters' stance.
Second, after the player is in the address position lean straight back three to six inches. The player not only gets a better sighting picture down the cue stick, their weight iis now centered to the rear of their body.
Third, the player must see the cue ball make contact with the object ball. If you do not see the actual contact it is difficult to determine what went wrong. This last piece of advice is one of the most important for resolving this issue.
Realizing that the body is the equivalent of a gun it is easy to understand that the head and body must be completely still or the firing mechanism can not fire correctly.
A temporary fix is to straighten the back leg at the knee joint. This works but is hard on the body over time.