But testing here even scaling and not applying the scale in my computer it doesn’t happen here.
Unless the scale is done to the base curve. If you scale it and don’t apply the scale, the bevel will grow.
Give a look here:
If the mean radius of the control points of your curve is not one, the bevel will be distorted. So, select all your control points and set the mean radius to 1.
So, to avoid problems, always scale curves or meshes in edit mode or never forget to go to Object, “apply” and “scale”. If the object is a curve, after applying the scale you must also select the control points and set the mean radius to 1.