When a Marijuana plant gets transplanted it is true it can shock the plant and cause it to pause the growing process slightly while it continues to mature. From my personal experience when a seedling was not growing to it's full potential there was a problem with wither HEAT or too much water. Based on the pictures I would say that it is probably not too much water... Remember seedlings like it about 70-75 degrees F and they like humidity when they are rooting. Depepnding on your situation I might pot a clear plastic bag over the plant to keep moisture in...but make sure you are not exceeding 75F...good luck