Sorry, i not realy understand what you do,
when you said you print a form with several WP areas?
Normally you print a wp document,
not a “print form with one or more wp-areas in it”.
maybe you forgot a correct setting/configuring of wp view
Look to on this docu:
When you have a inline image, no problem.
But in that moment where you define the picture as behind/inFront of text,
it is no longer a inline-image, it is a image in a separat layer with free positioning.
The positions belong to the pictures anchor definitions than,
default you got a picture with coordinates anchored to currend wp page.
To print thuch pictures, minimum “view mode paged” is needed.
I canot give a full exlanantion, because about wp and about pictures in wp
there are lot of features and lot of what must study before.
This are only any wild tipps, i do not know your exactly situation+usecase+codes.
Maybe you understand all correct and you found any exotic wp-mistake,
but first check if you done all well and in accordance with 4d wp docu.