Yes, warpage. It can be a bit of a problem with spirit based stain too, so go lightly.
Scratchbuilding with thin wood shhets, it's good practice to stain both sides to cancel out the shrinkage, but when wood decks have adhesive already applied, that's clearly not possible.
Just to repeat what I've suggested before elsewhere, do not plan to have the deck lay flat by use of clamps and strength of adhesive. It will buckle up over time. Try to get the deck to kay flat of it's own accord before final attachment.