problem with PrintSliding

Hi,

I created a form to print a invoice.
I use PrintSliding to allow move vertical (only grow) on the “designation” field.

It works fine when I the first field “designation” in the body have to grow:

But when the first field don’t need to grow but the 2nd or the 3th have to grow , it don’t works.

I hope that it is comprehensible:)

Kinds regards,