In the Pose library in the folder "!DAZ's Victoria 3" there's a pose called "!IPB Prep.pz2". Did you apply this to your character before you saved it? It strips away all the morphs but keeps the dial settings. You will see V3 changing back to her usual self but that's OK. I tried to use IPB on a figure without using IPB Prep first and I got exactly the window you're talking about.