Litho-laminating

Hello friends!
I work in a printing house where I am mechanic!
But sometime I have to cope with some technological problems,
and now I 've got problem with LITHO-LAMINATING sheets?

The problem comes from that the sheet which have to litho-laminate
has foil-stamp and when the operator laminate it, after trhee to five seconds
the foil-stamp zone is bubling!
Can somebody help me?

Thank You!